Credit
Credit is predatory by nature. The bank doesn't care when you max your card out on alcohol, designer clothes, gambling, or any other worthless and risky commodity. Your bank doesn't give a thought about you in any way beyond your capacity to generate revenue. You are a revenue generating unit and nothing more.
Credit cards
are detrimental to most customers. Trapping generations in
coils of debt using gimmicky point systems and fostering a consumer
culture encouraging people to make even larger purchases greater than
the sum of their bank accounts.
Protecting customers from crypto?
Banks build barriers to crypto, maybe because they view it as a direct and fundamental threat to their industries... and with good reason, because it is. The reality of the crypto markets is that no one really knows how valuable they will become and someone investing wisely in crypto right now is going to make a significant ROI over the next few years. This will open up the opportunity to pay off large balances, decreasing the revenue banks earn from credit interest. From this perspective, blocking the purchase of crypto could be seen as a desperate attempt at self preservation of profits.
But it's my money?
Yes and no. Large transactions get blocked often by banks, and it can mean hours of trying to pass security checks by phone. If your bank, or anyone, prevents you from buying something with your money, is it your money? If you've ever owed money to the bank you'll have an understanding of how efficient they are at taking it from you, even if it pushes your balance into overdraft (incurring even further charges). If you've ever owed an energy company a payment and requested extra time to pay it, only to find that company has taken the payment from your bank regardless, you understand the frustration and lack of control you have over who you pay and when.
Crypto investors tend to appreciate that once they have their private keys secure, no one can tell them they can't make a purchase with it, no one can make a transaction to withdraw those funds from your account without your permission.
What should i do if my bank blocks a crypto purchase?
I would encourage anyone who has their bank or credit card company create a barrier for them to purchase crypto, to immediately end doing business with that institution and make sure they know why. If my bank halts my purchases, I'll liquidate my account and close it the same day. Same goes with my credit cards, they will get cut up and never used again. DON'T bend over for them.