How much does Capital One charge for converting USD to cryptocurrency?

As a financial and cryptocurrency enthusiast, I'm curious about the cost associated with converting traditional currencies like USD into digital assets through Capital One. Could you elaborate on the specific fees or charges that Capital One imposes for such transactions? I understand that these costs can vary depending on the type of cryptocurrency being purchased, but a general overview would be greatly appreciated. Additionally, are there any hidden fees or additional costs that I should be aware of before initiating a conversion? Clarifying these details would help me make an informed decision regarding my financial transactions.