Dear Piotr, of course anther bull run will consequentely make an insane market, because people want to get profit in less time.
In the other hand the bear market we got last year it will be not suistainable again, because value of coins is very low and weak, so let say if market will rise as it is doing right now it will be perfect, because BTC in the last 6 months double its value, but not in few days...