Definitely not all crypto currencies are scam because bitcoin, ethereum and ripple are coins that are popular in the crypto world. It was an obvious that there are lots of people who keep on investing on bitcoin. I know that there is a sudden dropping of the price of other crypto coins, but if you are aware and updated to the movement of coins in the market, there is an increase value happened. I know it is not that huge, but at least, there is a progress.