Well it certainly is. Bitcoin is just getting started and its real effects are meant to be much farther reaching than just a few thousand people multiplying their portfolios.
Bitcoin is working to enable micro transactions so that everyone can use it for as small amounts as needed. These scaling solutions are layer-2 solutions that are dependent on the main blockchain for their authenticity. A lot of work and research has gone into it and it is
being deployed even as we discuss this here and even as the usual naysayers continue their FUD.
No matter what others claim, none of the other crytpos have the same level of decentralization and network infrastructure that bitcoin has. With Lightning Network, it will be the first of its kind to have it widely deployed.
It is here for the long run and is definitely worth a small part of your investment. It should be treated as making yourself part of something revolutionary. If you are not excited by the technology, its potential or don't understand it, then its best to stay away.
Those kind of people generally cannot stand the volatility and turn into naysayers. Nobody wants them.