good job. make sure to test the end result with Electrum itself to see if it actually works.
also keep in mind that Electrum itself takes some additional steps while "normalizing" the seed phrase before passing it to HMACSHA512 which don't matter if you are using the English word-list and don't add any extra spaces. otherwise if you use other word-lists that contain words with accents, Chinese letters,... it must be "normalized" the same way.
for reference: https://github.com/spesmilo/electrum/blob/f49e766b218649a5b64a196bcc055e41291fb223/electrum/mnemonic.py#L79-L90

since BCD is an exact copy of bitcoin protocol with changes that don't involve changing the OP codes, you should be able to spend any script that contains an OP_CLV if the locktime is reached and the output is actually spendable.
if the amount is high enough and you couldn't still spend it with conventional ways you could also pay a developer to write something for you to sign the transaction and then after manually verifying if the transaction were OK you could broadcast it.

bitcoin is a store of value because it is a medium of exchange. otherwise you would be storing some virtual numbers in a very expensive database without any value.

bitcoin transactions are super fast. it takes literary 1 second, or 3 worst case scenario to propagate a transaction throughout the entire bitcoin network that is spread across the globe. and fees aren't that high most of the times  but i agree that they should be lower.

that is your assumption.
millions of dollars worth of transaction is being processed by BitPay alone which means people are using bitcoin "to buy stuff" and that is not even considering other payment processors such as Coinbase, etc or even the merchants that accept bitcoin directly both in online and offline shops.

first of all there is nothing "fine" about FOMO. it is unrealistic buying and the resulting price has always been unstable waiting for a big correction.

secondly this is NOT a FOMO. if you want to see one then look at the first half of 2019 when price broke $4k resistance and it went up to $8300 and crashed -26% in one day. what we have now is still a very small and even slow rise which is about 14% whereas when you compare it with previous FOMOs they are at least 80% and up to 100% rise. the case i mentioned above is 150% and another FOMO would be the last month of 2017 where we saw a 120% rise in one month (from ~$9,000 to $20,000).

the only casino games that you may have some chance of winning, and that is only a chance not a guarantee, are games that are less chance-based and more skill-based and only if you are playing them against another human player on even grounds. for example maybe we can categorize poker in this group.
other than that when you are playing against the house which is the case most of the times, you are bound to lose because that is how the "house" makes money otherwise they would go out of business in a short time if they were losing.

the transaction is already confirmed but for future reference, the post you linked is not the way to "fix" anything when the transaction is not marked as RBF which OP's transaction isn't since it has max value for its sequence for its only input. since the transaction is properly propagated even after all the effort of messing up the wallet file and removing the tx and creating a new one, all the nodes out there reject the new transaction since it would be a double spend.

if they remove that particular version then all previous versions and any other old version should also be removed because that is what an "old version" is most of the times, a version that had some bugs and new one released to fix those. if you check the changelog or the code you can see that each version is fixing some bugs many of them could be considered security critical even if not that common.

as far as i can remember Electrum only created 12 word long seed phrases and although the code supports other lengths and also BIP39 seeds they include a wider range of word lengths.

by the way OP only has 1 post and hasn't been back for 3 days! ...and this looks like another case of "bought wallet file".

it was not normal market situation, in fact it was a very rare global event that caused the crash last time. when the virus started spreading all over the world and the world economy started crashing, bitcoin price rise was also paused and we saw the crash.
that is not something that we can see be repeated that often since as i said it is a rare incident.

right now the price looks good though. the rise was solid and slow instead of weak but fast. and there is a good buy support shaping up and if this momentum is kept for a couple of days more we can say goodbye to 4 digits forever.

that is correct.

when you communicate your address over the internet (posting it on bitcointalk, clicking on the payment link in an online shop,...) you are already using a form of authentication without knowing when that website is using SSL encryption. there is no need for message signing.

it is probably because you don't value your privacy!

it is actually bitcoin investors not crypto investors and most of them are actually unhappy about the rise because the "investors" at times like this are split into three groups,
- first are those who sold or hadn't bought and were waiting for a drastic drop so they could buy super-cheap bitcoins and are now witnessing their dreams crushed.
- second are those who have been accumulating during the "below resistance" times and now they can no longer buy cheap bitcoins and have to buy less with the same amount of fiat.
- and third which don't care are those who had their investment and were holding.

BTW it is only bitcoin investors because for the past 2 days that bitcoin has been rising, altcoins were dumping hard. any pumps you see like the ETH pump are from before the bitcoin price rise began.

usually things reported by cointelegraph or similar sites don't have any value to be discussed, 90% of the times they are pure clickbait.

in any case it is not surprising to see everyone eventually getting on board of the bitcoin bandwagon. it was predicted long before. specially companies like PayPal that want to make money and see the volume that goes into trading every day (hence the commissions they could earn). usually with them it is about creating another centralized shitcoin that they can fully control while making money from the hype. similar to what Facebook has been trying to do.

that -10% was an example scenario to explain the situation, the drop can be from 1-2% to 50% during a small bitcoin price rise. and it is the scenario that happens during bitcoin price rises not bitcoin price stability times.
when you look at "past week" you are also including the time when bitcoin price was stable which is as everyone knows the golden time to pump shitcoins.
bitcoin started rising on Jul 26 when ETH price was 0.0319 and it is currently sitting at 0.0289 which is a -9.4% drop during bitcoin price rise.

i think it was clear from context but if it weren't by "project" i mean altcoins and in that particular case ethereum.

wallets are already doing that.
they usually have a window showing all transactions or categorize them into different tabs like receive/send and then they show how much bitcoin was received or sent. for this part it doesn't matter how many input/outputs the transaction has, the user won't see any of that. it could also show the address from that wallet that received that amount.

if you want to see where the coins came from there is no other way than to see the whole transaction and all the inputs. which is again also already possible in wallets by looking at the "advanced" or "details",... page of each transaction.

in a bitcoin transaction there is no "addresses", there are only scripts. and an address is human readable form of scripts defined ONLY for a handful of them: P2PKH, P2SH, P2WPK and P2WSH. no other script has a defined address.
the early coinbase transactions and any other very early transaction are using P2PK scripts which have no equivalent address.

the fact that some block explorers such as blockchain.com are showing an address is their bug and they are too lazy to fix it.

most probably never.
a lot of countries have already made their decisions a long time ago and banned ICOs and any other form of scams that may take place under a different name to disguise the fact that it is an ICO.
considering the fact that the main use case of ICOs is for illegal activities including scamming newbies, it is a reasonable move too.

when a project promises a lot of things that delivers the exact opposite, that project is garbage. ETH promised decentralization, immutability, fast transactions, security, ASIC-resistance, cheapness, utility, and a lot more and failed on all of them. it also has one of the biggest premines and has been only getting pump and dumps for its entire existence.
that is the definition of a shitcoin.

you are only thinking of "making purchases" where you go to a shop and copy the address they give you and make a payment. but what about sending money peer to peer?
lets say i wanted to send you money, i would have to contact you on another (centralized) platform like bitcointalk, twitter,... and ask for your address in which case the address would also be known to and stored by those platforms, hence 0 privacy. but if i knew your IP address i could simply contact your node in a 100% P2P manner and receive a new address and make my payment with a very good level of privacy.
as i pointed out above the security could be increased easily by incorporating web of trust concept into full node clients.

if you look at the history, a 40% drop has always been very rare. they basically only happen if there is a massive bubble or a very big negative news during drops or side-ways market. we have neither of these since bubble ended more than a year ago and price has been under bitcoin intrinsic value so it has been underpriced for a long time and also there is a massively strong buy support at $9k that is growing in strength the lower you go.

in most cases it is not so much ignorance but greed and desperation combined with gullibility.
for example the case with all ICOs and their derivations like STO, IEO,..., the altcoin pumps, the Ponzi schemes and more are because the gullible newcomers want to make money but cannot do it because they don't understand how the market works and how useless these things are. so it is easy for them to fall for the false promises and pretty designs and big fake numbers.