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...
Only Ponzi projects can guarantee daily gains and no one talks about the losses of the trading on a daily basis. It is possible but the question is to show us a proven track record for at least 6 months. Day trading can be precise in the theory but it doesn't work in the real live market because of the uncertainty.
Not just ponzi projects do that. There are many different kinds of projects that let you get some gains on daily basis but there is no promise. The market is uncertain and the risk factor also makes it difficult. I think that if you want to take big gains, you should HODL your coins for long but if your coins are too weak to gain value, you might consider switching to another coin.
Switching to another coins is a good options to do while you don't have an assurance to get good profit on the existing one that you have. But I don't think we're fortunate enough to say if the new preferred one i much better than the old one. Because you're only going to try without even knowing it's capability, so everything was just only a lucky chance after all.