I agree with you. In fact, only a small percentage of the world's population knows about the cryptocurrency. Therefore, the crypto currency will not soon catch up with the popularity of Fiat. And hardly ever replace the Fiat
It is not really able to make it, that is the fact with bitcoin. And bitcoin will always be treated as an investment by most of the people, though many of us are already using it as an online currency. But there would be one day that the fiat will be upgraded into something that has the same idea with bitcoin and other crypto's.
Yes, bitcoins are now considered by many people as investments. This is due to the fact that the price of bitcoin is growing. In the long term, it can grow several times.
Few people use bitcoins to buy everyday products
Actually as of now in most of the countries, we can't buy any everyday products using bitcoins directly because they are not so popular in mainstream business yet. Bitcoins are more popular in the gambling industry. But for investment purpose, it is quite good because of its high price fluctuations we can make some profits regularly.