I think we have to be careful when we transfer any coin to wallet that we have, we have to make sure first whether the coin we get is using what platform, after that we are sure that we look for the wallet that we have whether it matches the coins we have, if you don't have it, we have to make a wallet that matches the coin.
So far, as far as I know, Myetherewallet is based on the ERC20 platform, so if you have Bitcoin coins, it is clear that the wallet cannot accept it, if you force it, you will lose your coins. like entering a room that is not for him but forced. So until now we can't, whether the next time it will be strengthened with this facility, we don't know.