#1) it doesn't pay any dividends like stocks
As others said, not all stocks pay dividends.
#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
Not all property goes up in value as well. And if you are a bitcoin holder, this is what we call paper losses only.
#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.
Oh well, there could be some people who don't like bitcoin as a investment. But I guess there are way smarter individuals who knows how bitcoin is specially if you become a long term holder, no offense.