Now, about the coin. Most of the crypto-followers are after the profits and don't care about the project. There are a lot of rubbish coins that are traded a lot because they just have great potential for profiting.
I think that this is the important distinction to make here.
You've got some centralised projects that are posing to solve some problem that doesn't even exist in order to raise money through selling their tokens/equities, which is really no different than that in a traditional sense - except they've added a buzzword in blockchain or "cryptocurrency". These are the ones that won't survive in the future.
BTC is certainly not one of them. I've always thought that bitcoin's first mover advantage has been significant, and the fact that there was no initial "public offering" as well as it being the most practically used coin as a long term store of value and medium of exchange.
Also, I disagree with your statement that all cryptos is no different to fiat. Bitcoin is certainly different in the sense that there is no central authority, or third parties that need to be trusted to control the supply of coins, nor the transfer of coins.