For me Bitcoin will be still the best as alternative investments as long as people will fully support the regulations and market price manipulation will be neutralize or will eliminated. If Bitcoin will be fully trusted in the coming years then expect many nations will follow the path of Japan and Germany making Bitcoin as world currency.
Ive been into this topic several times also but my opinion is that several years from now I think bitcoin would become more popular. Its usage would become high and many people would become crypto users. Theyll know the advantages and profitability bitcoin could give to them.