People have been saying that the US is in decline since the beginning of the US.
It very well could be, but there isn't enough evidence to definitely say that.
In any event, there is no currency (including any cryptocurrency) that is close to competing with the dollar and you have provided no evidence to the contrary.
Therefore, your argument is based in fantasy at worst and wishful thinking at best.
I've made quite a bit of money off crypto and I'm still invested in different currencies, but if you think any of them are even remotely trusted and secure enough to even be in serious contention of competing with USD as the reserve currency, then you're in lala land.
That will only happen when there's a currency that's strong and trusted enough to replace it. That currency does not currently exist and there aren't really any prospects.
Your posts indicate that you believe that quarantine is a problem and that you don't take COVID seriously.
Also, your poor grammar gave you away as a typical American idiot.
Take some college classes. Improve your grammar. Improve your understanding of science and the world.
You would think that someone that spends time in other countries would be more intelligent and worldly, but there are always exceptions (you are the exception).