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
If you bought litecoin 1 year ago with 10k usd, you would already have 1 millione usd in your pocket
Yes, It is possible to get the million dollars, if your luck permit and you have invested at the initial stages of the coin. If you see the growth in ETH and Bitcoin, you may have got your millions even today if you have invested in the two coins a couple of years back.