When
BTC Bitcoin pumps in 2020 after halving, what effect will it have alt coins?

No one knows on when and it doesn't guarantee that the upcoming halving event will give out some huge price increase in
BTC but basing on the previous halvings
then we cant really blame ourselves to have those presumptions and hopes which might happen on the upcoming halving event once again.Neither before or after the event on seeing that pump because usually if theres a pump it do happens after the event -So, it matter with choices on here.
Talking about altcoins, I highly believe that they would dumped down even more.Why? People would go all in with BTC because they do know about the possibilities on making profits with that btc halving.