I think just hold your bitcoins and hope that they go on to reach 20k or more in this year. You could try to trade the volatility, for example the dip recently from 17 to 14k but right now I think just buy bitcoin if you can and hold some, probably sell some alt coins soon because I think bitcoin will rally again before year end and then alts will dip.
I will not suggest trading with bitcoin the reason is very much clear. It is not only the most expensive coin in the world right now but also the most expensive investment as well, the most profitable as well. Bitcoin is evergreen coin so one should not waste it in trading, gambling g etc. rather save it in wallets for future purposes. It is easily going to touch 20,000 dollars by the end of this year, cash some of it out and enjoy.