No, everyone must not invest in bitcoin but should it comes to that in the future it's going to be one of the best investments choice everyone will be making. People that invest in bitcoin don't invest in because it's the only option of digital asset they've available to them, of course, there are dozens of investment options, but when wanting to invest into any asset there are particularities that would have to attract you which other supposed assets are lacking. When we look at limited supply, decentralised, a store of value and hedge over inflation and many more, these are features that bitcoin is known for, which many others so-called fiat related assets lacks.