The reality is that very little of this bull run has to do with tech as majority of these cryptocurrencies have limited use cases and even though they might be able to scale to Bitcoin's size in terms of transactions, likely couldn't handle Visa level anyway. It doesn't matter though because reality is that the problem with almost all cryptocurrencies is that they are generally inferior to their centralized counterparts, frequently include tokens that aren't required (even some of the cryptocurrencies I'm invested in fit this criteria) and have awful user experiences. It will take a long time to fix those problems, so they will likely all undergo a metamorphosis in the long-run. Bitcoin will stick around simply for the fact that it is the king, affects other altcoins' prices and is the cryptocurrency most people know about.