So I've been buying ETH, BITCOIN, NEO and a bunch of other coins for an investment in case the coins go up in price.  My question is this.  What exactly am I buying?  In many of these coins I'm not actually buying a currency, and I'm also not investing in a company where I get shares.  In fact, if I move my ETH around, I burn gas which burns my ETH.  If I continuously do this I could end with the 0 ETH. So is there any true value in these coins other than making money when you buy low and sell high?