The better question is probably when will the last fraction of a coin be mined.  The block reward started at 48 coins per block in August 2011 and halves every 218,750 blocks.  The table below shows the block reward out to the maximum eight decimal places.  It appears the last decimal turns to zero around 2029.  So 2028 will probably see the last block reward, although it gets pretty negligible years before.  Then again, what is "negligible" will depend on the value of i0coin at the time.

                                        Block                No. of  
Date               Block#          Reward             Coins                % Mined
---------        -------          -------            ------               --------
8/16/2011       1                  48                   48                      0.00%
2/20/2012       218751          24                   10,500,024         50.00%
8/26/2012       437501          12                   15,750,012         75.00%
3/2/2013         656251          6                    18,375,006         87.50%
9/6/2013         875001          3                    19,687,503         93.75%
3/14/2014       1093751         1.5                 20,343,752         96.88%
9/18/2014       1312501         0.75                20,671,876         98.44%
3/25/2015       1531251         0.375              20,835,938         99.22%
9/29/2015       1750001         0.1875             20,917,969         99.61%
4/5/2016         1968751         0.09375           20,958,984         99.80%
10/10/2016      2187501         0.046875         20,979,492         99.90%
4/16/2017        2406251        0.023438          20,989,746         99.95%
10/21/2017      2625001         0.011719         20,994,873         99.98%
4/28/2018       2843751         0.00585938       20,997,436.53     99.99%     
11/2/2018       3062501         0.00292969       20,998,718.26     99.99%     
5/9/2019         3281251         0.00146484      20,999,359.13    100.00%     
11/13/2019      3500001         0.00073242      20,999,679.57    100.00%     
5/20/2020       3718751          0.00036621      20,999,839.78    100.00%     
11/24/2020     3937501          0.00018311      20,999,919.89    100.00%     
5/31/2021       4156251          0.00009155       20,999,959.95    100.00%     
12/5/2021       4375001          0.00004578       20,999,979.97    100.00%     
6/12/2022       4593751          0.00002289       20,999,989.99    100.00%     
12/17/2022     4812501          0.00001144      20,999,994.99    100.00%     
6/23/2023       5031251          0.00000572      20,999,997.50    100.00%     
12/28/2023     5250001          0.00000286      20,999,998.75    100.00%     
7/4/2024        5468751          0.00000143      20,999,999.37    100.00%     
1/8/2025        5687501          0.00000072      20,999,999.69    100.00%     
7/15/2025       5906251          0.00000036      20,999,999.84    100.00%     
1/19/2026       6125001          0.00000018      20,999,999.92    100.00%     
7/27/2026       6343751          0.00000009      20,999,999.96    100.00%     
1/31/2027       6562501          0.00000004      20,999,999.98    100.00%     
8/7/2027         6781251         0.00000002      20,999,999.99    100.00%     
2/11/2028       7000001          0.00000001      21,000,000.00    100.00%     
8/18/2028       7218751          0.00000001      21,000,000.00    100.00%     
2/22/2029       7437501          0.00000000      21,000,000.00    100.00%     
8/29/2029       7656251          0.00000000      21,000,000.00    100.00%   
  

Yes, in my mind I was lumping payment processors in with merchants, but you make a good distinction.  Payment processors are probably much easier to target because they make money on the transaction itself and should welcome additional coins as long as they are stable.

But there are cases where a merchant is particularly large or a gaming site has a lot of activity where it may pay to target them specifically.

I was mainly pointing out we should not ignore people who actually buy and sell real stuff.  Without them we are expecting investers, traders and miners to create enough transaction volume to keep iXcoin's economy healthy. 

I can see some cryptos, like iXcoin, specializing as long term stores of value if they have low or zero inflation rates.  However, miners still need to stay happy by getting enough transaction income.  Without them we loose block chain security.

Having merchants accept an altcoin may not be an absolute requirement, but it's still a good goal to include in a strategic plan.  Merchants increase transactions, which is going to be more and more important to insure miners stay interested once iXcoin has mined all its coins.  Merchants are also like free advertising because they expand people's knowledge and acceptance of the altcoin.  So  I think we need to work on merchant acceptance at some point if they don't start using iXcoin on their own.  But I like your priorities at this time of getting the client updated, website and forum up, etc.  First things first.

Ixcoin hash rate now up to 4.3 PETA Hashes/Sec.

6,600 IXC is on its way to your dev address.  I've decided to send the rest of my bounty plus a little extra.  Although I don't yet have a working updated Ixcoin client, you've done so much with the website, forum and promotion that it is worth it.  Plus we need to keep things moving forward.  I've now paid my whole bounty of 10,000 IXC, plus 100 IXC extra.  I hope to get the new client soon.  Thanks for your effort!

I would continue to post on bitcointalk, but I think it's a great idea to have an iXcoin forum too.  It allows the iXcoin enthusiasts and discussions to be focused in one place.  It should make for faster progress.

3,500 IXC is incoming now.  I'm sending it to keep the momentum going on your development.  The rest of my 10,000 IXC bounty will be sent when the client is fully tested and a compiled version is released.   Keep up the amazing work.  Ixcoin has needed a promoter/developer like you from the beginning.  Thanks!

Ixcoin hash rate now up to 3.3 PETA Hashes/Sec, and the price continues to rise.  The sleeping giant is waking up!!!

You should also ask for persistant miners to post their node IP's.  Then we can add them to our config file.  Judging by the hash rate of ixcoin there must be a number of permanent nodes already out there.  You may not even need the droplets, although it certainly doesn't hurt since you have better control over them.

Not true.  A block is generated every 10 minutes.  Transactions are processing normally.

I0coin has a lot of potential.  I0coin has a 75 second block time vs 10 minutes for Ixcoin.   I0coin is about 95% mined vs Ixcoin at 80%.  Both have a coin cap of 21 million.  I0coin is behind Ixcoin for a few reasons.  With its faster block rate its block chain grew so fast and took up so much memory that all but a few miners stopped, and it was dropped from exchanges.  Now those problems are fixed so it is gaining momentum again.  Its hash rate has been steadily increasing since the new client was released.  

Now we can watch it grow!!!

Yes, I0coin definitely needs a website!

Thanks for adding I0coin!

I'm still in for the 10,000 IXC bounty I offered on page 1, as long as we don't change the 21 million coin cap.  I don't think that should ever change.  It's the same cap as bitcoin, which is doing just fine.   "there isn't enough coin to go around" is actually good if we want the price to rise.

FrictionlessCoin, your effort is actually very much appreciated.  It's been over two years since someone stepped up to do an update.  But, when someone starts talking about protocol changes it makes people nervous.  Many have been mining the coin for over 2.5 years and the wrong change could spell disaster.  

I think the main reason Ixcoin has lagged on volume and price is that no client updates have occurred in so long people wonder about its future, and of course no services yet to speak of, but those will come with time.  I don't think it has lagged because of the cap or even the block reward ending in 2015.  

I'm not as against extending the block reward beyond 2015 (by lowering it), but I'm ok with leaving it alone.  No one really knows what will happen to the hash rate once the block reward stops, but I'm optimistic it will remain strong.  Everyone who has mined for years has an incentive to keep mining, and I don't see enough dumping to convince me the miners are offloading that much.  We're also already seeing some transaction fees similar to bitcoin, so miners appear to be preparing for no block reward.  

What Ixcoin has always had going for it is a massive hash rate.  It's always been in 3rd or 4th place even after 100+ alt-coins came on the scene.  That's nothing to sneeze at.  It also has a very steady 10,000 transactions per month ( cryptometer.org ).  That's well above the transactions on the two exchanges, so someone is using it for more than just speculation.

One more try for a cleaner I0coin table...

                                        Block            No. of   
Date               Block#          Reward         Coins              % Mined
8/16/2011       1                  48               48                    0.00%
2/20/2012       218751          24               10,500,024      50.00%
8/26/2012       437501          12               15,750,012      75.00%
3/2/2013         656251          6                18,375,006      87.50%
9/6/2013         875001          3                19,687,503      93.75%
3/14/2014       1093751         1.5             20,343,752      96.88%
9/18/2014       1312501         0.75            20,671,876      98.44%
3/25/2015       1531251         0.375          20,835,938      99.22%
9/29/2015       1750001         0.1875         20,917,969      99.61%
4/5/2016         1968751         0.09375       20,958,984      99.80%
10/10/2016      2187501         0.046875     20,979,492      99.90%
4/16/2017        2406251         0.023438     20,989,746      99.95%
10/21/2017      2625001         0.011719     20,994,873      99.98%

I didn't find a link for I0coin, but here is the schedule.  Can you use this?  It's a very easy coin to calculate because about 95% is already mined. So the total quantity of coins is not changing much.

I0coin initial reward: 48 coins per block (cut in half every 218,750 blocks)

Maximum I0coin that will be mined is 21,000,000.

            Block      No. of   
Date      Block#   Reward   Coins              % Mined
8/16/2011   1      48      48                0.00%
2/20/2012   218751   24      10,500,024           50.00%
8/26/2012   437501   12      15,750,012           75.00%
3/2/2013   656251   6      18,375,006           87.50%
9/6/2013   875001   3      19,687,503           93.75%
3/14/2014   1093751   1.5      20,343,752           96.88%
9/18/2014   1312501   0.75      20,671,876           98.44%
3/25/2015   1531251   0.375      20,835,938           99.22%
9/29/2015   1750001   0.1875   20,917,969           99.61%
4/5/2016   1968751   0.09375   20,958,984           99.80%
10/10/2016   2187501   0.046875   20,979,492           99.90%
4/16/2017   2406251   0.023438   20,989,746           99.95%
10/21/2017   2625001   0.011719   20,994,873           99.98%

Primecoin only started in July.  Most coins have a quick run up in price for the first few months because of low supply, then a sustained drop kicks in for 3-6 months until the price reaches a sustainable level.  It's probably on its infancy down slide now, whereas most other alt-coins have already matured past that stage.

Both are great alt-coins!  Some pump is ok as long as it's not for a short term dump.  We should have a goal of long term support and stability.

Goals should be:
1.  A development TEAM... not just one dev (or none)
2.  Getting some sites (stores, gaming, casinos, etc.) to use these coins
3.  Getting the coins on more exchanges
4.  Improving their home pages

I can't imagine Bitcoin being the only crypto in the long term.  Many alt coins be successful.  Eventually some will equal or surpase Bitcoin.