Long term investment is pretty cool. the only challenge here is how ready are you for that feat.
If you are liquid; why get in a haste to sell off you potential investments on the short run.

Again; you need a very good analysis of some ICO project to discover that most doesn't seem to have that intrinsic value. Taking a close look and discovering an unexpected appreciation in value; it's actually worth selling off and reinvesting same in coins with better promises.

In all; it's not all about long term Hodle; but long term with utmost vigilance.