Ethereum is the main thing to stay by all means.
Just think the facts.
BTC is going up only because it is marketed a lot.
ETH by that time made a huge progress in technology and price. It runs twice as more payments that all the coins altogether.
Its price has grown x40 since I started mining and investing it last year.
They have a lot of devs working on it (2nd place after Bitcoin and I wonder why, cause it has much more use cases than bitcoin)
ETH is going to POS in the nearest future, so it's totally undervalued.