Bitcoin has the potentials to become the best and biggest investment in the world, if we are judging by it's achievements from the time when it was created, it can surely reach greater heights than most of us imagined. We have other investments that have gained ground as the world's biggest investments like real estate and gold but I believe that in the future Bitcoin can join them. The adoption of Bitcoin is still increasing and by the time most people sees it's potentials as a valuable asset and begins to hold it, it will can become the best. We have to understand that it is not everybody that will be interested in Bitcoin so without it toping other valuable assets, it won't take anything out from it being a very profitable asset to hold for a long term.
Bitcoin is already bigger and it will continue to grow who would have expected bitcoin to grow like this over the years because no one saw this coming not even satoshi and were ever is now he would be extremely happy because of how bitcoin is growing, and just in a few years bitcoin have archived more than half of what bitcoin have archived, even when no one saw bitcoin as an investment because a lot of people still see it as a Ponzi scheme. But people are getting more understanding as time goes and that is why they are asking people to do there own research before investing.
And even when you look at the market cap if you see the amount of money people have invested in bitcoin then you will Know that bitcoin is a big investment and the market cap keeps expanding because there are more people investing into bitcoin, and people will keep investing and been a value you can buy as low as anything and hold for a long time just to make profit it can be used as an investment, very few investment can be in the same shoes with bitcoin but when it come to digital investment bitcoin should be the best.