#1) it doesn't pay any dividends like stocks
#2) risk of extended drawdowns which could cause loss of principal unlike in a real estate investment where the property only goes up in value
#3) unfavorable tax treatment since it cannot be depreciated like many types of assets can be when used for business purposes
the fact that it doesn't pay any type of periodic cash flow while it is owned is a serious issue. for these reasons i don't really like bitcoin as an investment.
It seems like you have to look further back in time when Bitcoin was traded at a low price, now Bitcoin is trending in the investment world because it has helped many investors increase their wealth. It is difficult to explain what an elephant looks like to someone who has been blind since childhood, but currently Bitcoin is increasingly popular with various levels of society because it is considered a very promising investment. The profits generated in Bitcoin have changed people's perspective in choosing investment media, Real Estate and other stock investors have started to shift investment flows to Bitcoin because of the huge returns.
Politicians like Trump are also starting to open their eyes to the power of Bitcoin, he is very aware of how valuable Bitcoin is and the growing Bitcoin community, he brought up the theme of Bitcoin in his speech because he started to see the great power of Bitcoin. If you don't like Bitcoin as an investment, that's your right, but without your involvement in Bitcoin investment it will not have any impact on the Bitcoin market.