Opening a bank account is only part of the problem. After that, the bank receives the funds you converted from crypto assets in a regular bank account and often blocks them, or, alternatively, allows them to be transferred to your account at another bank and then the funds are blocked there. Why?
The first possibility is that the selected bank is located in a country that is unfavorable for withdrawing crypto into fiat money. In some countries, some banks block fiat money as soon as they realize that it has been transferred from crypto.
Another possibility is that the bank was not satisfied with the results of the KYC procedure. If KYC fails, then there is no SoW nor documents confirming the sources of the funds. Hence, the block. To establish an increase in the value of crypto assets, independent consultants or appraisers must be involved.
Any amount not demonstrated by the bank will be blocked, and the same thing will happen with each subsequent bank that the money is transferred to. At this point, there is a global risk of losing the blocked funds if the bank does not accept the explanations and documents regarding the disputed amount.
If the bank doesn't understand the situation, it may also respond by limiting spending based on the amount blocked in the account. The bank itself determines the daily disbursement limit. This situation is also related to the issue of the origin of funds, and carries the risk of losing any disputed amounts.