Cryptocurrencies are volatile but actual investors never get 'skinned' by swings, only inferior traders trying to compete with superior traders. The same applies to cryptocurrencies, stocks, metals, or anything else.
You analyze long term prospects, buy, put the coins into cold storage, and unless long-term prospects change (which happens infrequently) do the actual hard part: wait and do nothing. Short term swings are of no consequence whatsoever.
TLDR...
Cheeeep coin guys.... buy buy buy LOOLLL
No, I leave up to you whether to invest or not. My statements on this are pretty clear. But if you do actually decide to invest (as opposed to trying to compete with the other traders in a zero-sum
* trading game), then short term swings are of no consequence to you.
* Actually negative sum, given exchanges taking roughly 1/4-1/2% out of each trade.