It's not like old coin will be remained into this crypto market. Moreover, we must read those old coin/tokens tokenomics whether team/foundation tokens are unlocked or not because most of the team tokens from different project which was started in the previous bull run, are already unlocked or going to be done asap. And if anyone from that team start to take advantage of the alt season, that coin might be dumped and supporters get themselves as rekt one. So we need to be more aware about this.