The worse things are in the US, the worse it will be for the whole world in General, and BTC in particular
Your reasoning is quite correct
But your premises are quite shaky. That is to say, crypto won't be a lot better than the world around it, but what would make the world a much worse place than it is now? You essentially say that Biden is going to destroy the American economy (or substantially impair). But is this really so?
Given the overall focus of Biden and his team (and party), I have concerns that the US economy will go down for the "common good of redistribution between rich and poor”. He is going to not only raise taxes on large incomes but have desires to restart the notorious ObamaCare and God knows what else. All this will cost both a lot of money and a lot of reputational risks.
When you think that BTC is a fully decentralized currency, you forget the simplest truth - you can't buy it without using dollars. And when your entry point suffers, so does everything that comes after it
It is not about dollars
You can buy Bitcoin with, say, rubles. Kidding aside, cryptocurrencies are not possible without people supporting them and using them. After all, who would care about dollars if you could pay for things with crypto directly?
This is the biggest problem of cryptocurrencies in particular and the entire crypto community in general - no one wants to just take and pay for anything directly with cryptocurrency, even pizza or new smartphone. Everyone wants BTC for $50k and after their wallet would be full of paper money.
I have already said many times here and I will say again that until today's community wants to live with cryptocurrency as "real money" and not as an investment, then there can be no question of any mass adoption.