In order to have new alt season, we need more investors. When a new investor enters in to Crypto market, most of their entry is via Coinbase. I would say, coins listed in Coinbase will see more returns overall. Putting money in to all or some of those coinbase listed coins not only a safe investment, but returns will be high.
I would stick, BTC, ETH, XRP, LINK,ADA, ZRX, KNC, COSMOS, TEZOS, LTC, DASH, EOS, XLM, BCH, MKR,OMG and REP. + BNB and KCS outside of Coinbase.