both of them have huge risk.. make analisis and preparations before you choose to play it... dont forget to learn from many experience....
whats the risk in Holding?if you are investing for longer term specially if Buying Bitcoin i guess it is more different from trading.
many fails in trading because of the early entering without deep knowledge in crypto market.
Not like in Investing if you set to even wait at least 5-6 months minimum there might be a chance to go up in that margin of time.