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
Agree. One Million dollar is not impossible in cryptocurrency but there is a condition, and that is to learn to wait and never panic after choosing the good project for investment. Let the time for your labour brings you the lossible million dollar. If you bought litecoin 1 year ago with 10k usd, you would already have 1 millione usd in your pocket