These altcoin price discussion all comes down to market prices. I doubt any coin could go way too much without all market going as well. I have seen coins make x2 returns while market is bad and that is good, who can make x2 in any other investment but when it comes to bitcoin and altcoins you can have as much as x10 and wouldn't be shocked, that happened multiple times before and it could totally happen again as well, however no coin will do more than x2 ever without market going up as well, if all coins go at least x2 than some of them could go x5 but without all coins going up like that no coin will ever do x5 all by itself.
Binance is one of the best coins out there, its definitely on my top 5 but do not expect it to make you too much money while market is down.
yes you are right in the past bitcoin might be able to go up x5 or x10 or x100. but now it will no longer be felt. after yesterday's downfall there were no coins remaining at their standard prices. it becomes normal if there are coins that suddenly rise better than other coins.