Is it possible to profit from collapses of altcoins? Do you have any ideas how to?
I don't really understand what you mean by altcoin collapse because any coin that had collapse may not be able to go bullish again. The market is going to be going bullish soon and I am very sure that most altcoins that had lost there liquidity may now start going bullish again since the market is still very positive with more better movement that will lead to a big momentum.
Basic initiative, collapse is another term for dip, correction, or anything bearish. Collapsed is different from "dead", those are the coins who will not gonna rise up again.
Also, the market isn't bullish yet, but it's good to buy top alts in the market today while the price is still affordable. Bullish market may most likely not gonna happen sooner, but most likely before or after the Bitcoin halving next year.