early 2019 until now, we have BNB coin. A very potential coin and now Binance is the largest exchange of the crypto ecosystem. This x5 x6 story is a very futuristic story and it only happens in some good alts and has good strategies. The alts you have listed are mostly good alts and it has weathered the storm of 2018. It is highly likely that these alts will continue x3 or x5 in the future. because alts with potential will always be able to survive and it will come back soon if BTC reaches ATH again.