Question about  investing in Cvc, Cardano or polkadot.

I have a goal in 2 years to get a plot of land..  im saving 200 a week in a saving account..   im looking to place 1000 initially into one of the above cryptocurrency with an additional 50 dollars invested a week in it.

I won't be day trading.. just a somewhat safe investment that will increase with time.

Any suggestions?
I'm also open to other ideas.

What I like about these is that they haven't had a rapid growth recently that always makes me think of a bubble.   And the value is stable with an upward trend on them.