I think that Bitcoin is HYIP in some sense. Let me explain. Bitcoin was created like first cryptocurrency for secured transactions, but now, all the peoples are buying it just hoping it's value will grow. And here is what happens: early investors buy BTC by low price, then, late investors buy for higher price and afterwards first ones sell it and those who invested their money later lose them. I think the main problem here is that cryptocurrency is not used by it's main feature. Do you have something to say about it?