A favorite counter-argument among optimists is a comparison of Bitcoins with real gold (they are often called "virtual gold"). Remember the demand for real gold. Once $ 300 for one ounce was considered very expensive. During the 2008 crisis, gold rose and reached $ 1,800 per ounce. And what is gold? Than it is provided? It's just metal. Bitcoins are also not provided with anything. However, the potential opportunity to make it an international currency makes for it unlimited growth prospects.
respect your view and like you say maybe bitcoin will be more than coin in future and price more than 100,000$.
about make it legal. not know but it’s hard to find country legalized bitcoin