Ok, you like to cherry pick. Let's do it.

The S&P500 10 year return is 148%

Bitcoin 10 year return is 18,000%

As for usefulness you can send billions worth of Bitcoin accross the globe in minutes for a few cents in fees.

You can send money to places where goverments block any transaction for political reasons.

Bitcoin gives access to a banking system for the 2 billion unbanked.

It is already the most available international currency. You can pay in hundreds of busineses in just about any country. Try that with your mighty dollar.

The dollar has lost 20% of its value this year and 98% since inception. Bitcoin has appreciated 100% a year on average.

It's that enough cherry picking for you?