I am actually long on everything and holding everything, it is probably a mistake or maybe not.
I could sell ETH when it was 400$ but i didn't (bought my ETH at 88$ back in May) i could sell also other coins that were high Golem steem riple ...etc,. i guess that one can do some day trading and make/lose some money but me personally i don't.
when prices go down i just buy some more
I wish i had more time to play with the cryptos ...but having a day job I cannot