There is no definite trading strategy here and you are just investing randomly and hoping to get good returns.
This might work 1 or 2 times but it's guaranteed to lose the next time. So consider rethinking about this right now.
Not really because if you on average look at coins in the market you will notice that at least 1 of the 5 coins will rise and the other 4 will not become dust immediately and will at least yield small loss only. I mean yes the market is very unstable in terms of alts but if you just do little due diligence then you can make fine profits and yes some bad rounds will always happen.
By the way looking at your disappointment in your post it seems like you never had good trading memories.
The market is bleeding. My portfolio went down to 10-15%. Such a sudden drop. I have 19 days to wait. Hopefully, each coin will pump in this period so I can close my positions and prepare for the next round.
That is one problem I see with alt coins because when a altcoin which is not so significant in market drops down it usually just keeps dropping lower and lower, I don't know what the reason is but I have hardly seen coins that drop below expected price and then raise back to unexpected prices.