In many countries investing in cryptocurrencies is considered a gamble because they say it unpredictable unlike the Stocks , a reason "They also noted almost no correlation to other currencies and commodities."
So yeah , this would get attention now because "Yale" issued a report regarding this otherwise this is what we already knew. Well better late then never
Anything that does not generate cash flows is speculation. In that regard they should not outlaw investing in gold, silver, houses, etc. Basically anything that isn't a stock or doesn't pay dividends. Bitcoin makes sense as a portfolio hedge at the least.