Possible, if you bought ethereum 1 year ago with your 10k usd. Now you would have 600k USD. Very close to become a millioneire 
If you bought litecoin 1 year ago with 10k usd, you would already have 1 millione usd in your pocket
You're right on LTC, ETH. So if since last year that he bought that 2 coins, I think he is millionaire now and he is celebrating his life 3x a month. But now, It is very hard to get millions on 1 coins/tokens only because a lot of new token from ICO attracted the new investors. So for me it is hard to get million now. Maybe if we bought last year and still holding until now.If you bought litecoin 1 year ago with 10k usd, you would already have 1 millione usd in your pocket