What makes it more powerful now...?
Maybe he's referring to the fact that more and more financial institutions are preventing people from buying crypto on credit, which can indeed be seen as some sort of a sign that they don't want it to grow further.
By preventing people from buying crypto on credit, they at least made an attempt to potentially halt Bitcoin's growth, but it won't have any impact at all. It requires an extra step, but credit can still be used to buy Bitcoin with.
The larger Bitcoin grows, the more financial institutions acknowledge that Bitcoin might end up taking over a large part of the market they for decades ruled with iron fist. It's time for a change, and that change is called Bitcoin.
Banks will never accept it out of free will, but eventually they have to. If you can't beat it on your own, then adapting to the situation is the only thing left to do, and that's banks adopting Bitcoin one way or another.
How does that mean the banks dont want it to grow? When people get hacked and bitcoins are bought, the banks are paying that out... you have to remember that most people are not very educated in cryptocurrency or even finance and will be over buying.
IMO BOA is a terrible banking solution anyway so I wouldnt use them.
I think bank doesn't want for crypto to grow because its a competitor. Bitcoin for examples takes away third party, which is banks. So their potential profits is already lost. That's why government thinks that crypto is do disruptive because it will make banks obsolete. This is the same argument that they have been throwing since day one they stage an attack on crypto's.
so, in fact they stop people from making low purchases, controlling how people spend their own money.
It seems to me that this is not illegal, is it?
Remember when you put your money in a bank it is no longer your money, the money belongs to the banks and they can do with it whatever they want, only when you are able to successfully withdraw the money from the bank that money belongs to you again, this is why you must not feed the system, having your money in the bank makes them more powerful, if it is a low amount keep it in your home and if it is a big amount you will need to find to store it in some other way which does not involve banks.
Exactly, and most banks will make you maintain certain amounts, so when your money fall below it, they will deduct a fee. As opposed to crypto which not only eliminated them, but you have total control, hence you are your own bank. So it only makes sense for BoA to banned cyrpto buying with their payment system.