If bitcoin go over 20k$ i think we will have an altcoin bull run but only for altcoin who have real support and are most used, anyway better to gather more coins until then and why not to get more bitcoins.
Everyone wants this to happen but the reality is that the market is still in a downtrend and it is difficult to predict the future. I think $20,000 will not happen this year and it will take at least 5 more years for this to come true. Currently altcoin is the riskiest investment in this market so I will not invest and will only choose to invest in some good coins like Bitcoin or Ethereum.
crypto cycle doesnt need 5 years to wait. it just takes 1-3 years to reach new ATH
look back in last two ATH and youll realize that. so, if it would happen again, the next new ATH will happen in 2021
we can see the history will repeat again in 2020 or not, bcz in 2020 should be knowed "bull" 1 year before ATH