For me 30% or more gain is still possible in everyday trading, especially if you choose new cryptocurrency which has a lot of supporters.
That's everyday man? Are you sure about that? you must be very good to earn that percentage on a daily basis, I call it impossible. Sorry...
People like to exaggerate thinking they will convince others how successful they are. Even if he makes such percentage it's only ocassional, not on every day basis all the time so don't bother with that. Even extremly capable and successful traders wouldn't claim this is possible.