Is there any valid reason to stay away from cryptocurrencies?
I think it is good to have some discussion here for our kind information.
If you are looking to invest money as of now, you shouldn't because its at ATH (All time high) right now. All that the current buyers are doing is increasing the profits for the early adopters who got them in the hundreds and thousands for dirt-cheap prices, while you'll have to blow through 2-3 weeks'salary to buy a fraction of it now! This is completely favored to those at the top and such an investment is a typical MLM, Ponzi scheme. These are just the sensible reason why you shouldn't invest right now.
What you should invest is probably your time to earn BTC online by working for it. You should also put in the time to be a part of the conversation, maybe try your hand at mining with some cheap gear.