Not all altcoins is depending on bitcoins value but most of the time they are dumping when bitcoins price is falling too and about into your question. Yes, its possible since we do know that anything can possibly happen here on crypto. Alts can top out when it comes to price but only possible into those coins who do follow bitcoin on rankings but this wont happen overnight and I shall say this would take years for sure or might not happen at all. who knows?