In the last 24 hours, Bitcoin has been worth between $232 and $238, so that could be called a 3% fee on top of the 0.5% fee, and that 3% is just from the last 24 hours. If you look at the last week, the fee could be considered even higher (more than double or quad that).
The problem with Bitcoin is that it is extreme volatile. So you may gain or lose money. So while a 2.9% free on dollars is fairly predictable, you really don't know what the final "fee" would be on Bitcoin.
The problem with Bitcoin is that it is extreme volatile. So you may gain or lose money. So while a 2.9% free on dollars is fairly predictable, you really don't know what the final "fee" would be on Bitcoin.