As far as I know there are no commissions, there are only spreads, buddy. Maybe I am wrong about that, but anyway both spreads and commissions are type of charges in market makers' favor. Still, they are quite narrow here.

I had a chance to trade btc and had a nice rally trading Ada, noticed no serious charges at all. I mean, they exist, but they are unnoticeable, so don't worry much about that. The company does its best to hinder big/ask gap expand tooo much. Also consider time when to trade, cheers!

I want to delight you. Iq option has no commissions on any of the tradable instruments whatsoever.
So you cna trade bitcoin or any crypto asset with the peace of mind pal.