I personally believe, that the combination of long term investment - buy bloody dip - sell high combined with mid term trading (swing trading) is probably the "safest" combination out there, if you can't find another low coin or ICO.

Why I believe it? Because the only factor in these is me, how I perform with my trades using volatility. It is unlikely to get scammed or falling victim to some ponzi.
Most of the negative factors which other investment methods bring with themselves are relatively irrelevant in swing trading, as far as I understood.

Long term investment on the other hand is something very risky if done with less trusted projects and are probably less risky going with BTC or ETH as some examples.

Everything still works in terms of probability, as we know. The market surprised people I know including myself pretty often, especially in the last month or so.