two huge mistakes are found in this little statement here.
1. if anybody had lost 70% of their investment then it means they shouldn't be investing in first place because they have no idea what they are doing. and this is a very serious thing. 70% is ridiculously huge even for a volatile market like cryptocurrencies.

2. calling it "portfolio" when it  clearly isn't one. what it is however is a bag of similar objects with same performances. they go up in pumps and they all get dumped like each other. some a little bigger than the rest. having multiple of them doesn't make it a "portfolio" it only makes it into a tool to fool yourself into believing you have diversified.