Generally people don't lose all their investments in a stock or index fund. They might go down in price 10% on fund xyz but won't lose all their value. Do you not get that difference with this, this would not happen if he bought stocks with 10% of his money.

If I buy a fund that holds 90% cash and 10% of a BlockFi farming contract, then I only lost 10%. OP said only 10% was in blockfi, so he did not lose all his value.