Sell/buy/trade crypto jaxx

Hi, i have a relative small amount of crypto on jaxx wallet. Bc, eth and litecoin.
i was thinking about trading it using shapeshift. My logic is that the prizes we Are seeing maybe Will see a drop like 2 years ago(boble) I know highly speculative. But If so should i put it into lets say tether and w8 for a rise again,or just simple sell it on coinbase.
Hope this make sence.