I once won 2 BTC with a parlay bet on directbet and that by far is the best win for me. I never tried too hard to win it and it was just mean to be fun, but I actually won it. It contained 9 bets and I was like " OH MY GOD ! "

I wouldn't actually count on that, being a single bitcoin priced at more than $5000, unless in that span of time, the trend is that bitcoins are used to buy luxuries like real estate, cars, branded items, lands, etc.

Depends how important that money is to you. If its very precious then maybe invest or just wit for price increase. If its dust for you ( ah you are rich ) then maybe gamble with it on various creatives games listed under section bitcoin gambling.

My favorite also is roulette and sometimes dice. I love playing roulette and the bone chilling experience when you choose 4-5 numbers and the number actually wins !

I just bought some physical items from my friend who takes all the bitcoins from me and give me whatever I need.
He also gives me my local currency for bitcoins. I bought some gaming CD/DVD'S and some more items.

Game currency ? I think you meant to say that you use bitcoin as a gambling currency mainly. Friend most of us are same here, we only use bitcoin as gambling currency because its anonymous and cant be traced.

Well there's actually no telling whether bitcoin holds for that long because I'm pretty sure more and more alts are going to be made and be successful by that large interval.

Actually you are right but there are certain strategy by which we can lower house edge effect and make some decent profit. There is no harm in asking from a community like this where the best of bitcoin gamblers share their views.

I have been a part of many ptc websites and mainly all are low paying. It's good only to join sites with a minimum payout of $1 or less and you are able to earn $0.05-$0.1 without referrals.

Then it's possible to reach the minimum payout in 10 days and it takes barely 10-15 minutes per day.
With referrals, the earning also increases and many users just buy referrals offering an RCB. It's better than having a paid membership with any of these ptc websites.

All the barriers will be closed and what I saw in a recent article was that the bitcoins price will rise too high too soon. Maybe the time has come ? please suggest me should I hold or stock more or just sell them ?

In my another perspective, the best wallets are online bitcoin and altcoin exchange websites. I have used sites like btc-e for keeping my BTC , though they charge a fee of 0.001 on each transaction, but at least I am safe

Actually its tough to reach 10k price first of all, because 1k was reached and a lot of hyped was there.
Even if it gets there ( I hope so ) then I think its difficult to replace or vanish fiat, because its what users's basic currency.

After some sites scammed recently I was very upset and almost loosing interest in bitcoins but I am happy and believing again in btc due to the price rise recently ( from 400$ to 550 $ !!! )

You should play at trusted casino sites like primedice, justdice at least these two gambling sites we all trust without a question, but others you cannot trust so much. Please investigate a lot before playing big.

You should not go for dice gambling if you want your luck favours you more time to give you more entertainment of gambling. Or else you should quit your dice gambling once you find yourself lucky.

Even I am also preferring both bitcoin and holding cash. But I'm not going 50% each. I am investing into bitcoin more and keeping very less amount of cash. In future I believe I can reduce the amount of cash I will be holding based on bitcoin growth and adaptability in my country.

Do not discourage people. Even building the requirements and running it is not possible for the common man, we must appreciate them for their intention to start such a things for promoting bitcoin ecosystem. I believe, their intention will get them small scale business initially to get start.

But when you are getting as an established trader with most of the exchanges, you will be getting reduced trading fees. You can comparatively buy or sell bitcoin with the very less fees.

You are right there are enough time even after that occurrence of halving to make this year most of the rememberable. Maybe we are going to see bitcoin prices will hit $2000 price levels also within this year.

Making a kid attracted towards earning bitcoin would be very much easier unlike adults.
Because most of the kids are looking for computer related activities. But, by introducing bitcoin earning to them we are killing their younger age activities. So, I never recommend making kids into bitcoin related things.