When BTC come to 20K again, some coins may run with BTC. Some coins who are top ranked and already proved themselves. ETH, XRP, LTC, BNB etc. They can double even triple their price together with BTC. By the way probably most of the coins can east crush under BTC while BTC running to 20K and get ever worst if BTC will find new all time highs. It looks logical keep some amount of BTC without trading and buy some coins who are strong at market which I mentioned below.