I think holding long term is safer and more certain, although profits will accrue slower. Trading is more seductive but you are most likely to do more damage than good to your bottom line.

The best way is to look for good airdrops and hold them. You risk nothing because you got the coins free, and you don't have to analyse markets or guess or anything.

I'm currently following the marinecoin airdrop. Everybody that qualifies (up to the first 20,000) gets 450000 MTC ... each!. No need to invest your cash or worry about trading. Just qualify, apply, and hodl. It doesn't get any simpler than that.

There are many reasons why marinecoin is attractive, but I won't go into that here, as it would be out of topic. If you are interested, go to marineco.in for details on how you can qualify for the airdrop and contribute to the community and help it grow