Elctroneum is best had at Cryptopia https://www.cryptopia.co.nz/
As always due your own due diligence into these exchanges and your purchases of these blockchain technologies.
Some may be the future and other are an idea that will be built upon.
both on many different exchanges.
Not long ago, Ether Delta was one of the few that listed VERI, PLR, and PPT. And it is not easy to navigate and deposit funds.
There are many paper and off-line wallets and chrome app safe such as Exodus
Paper is fine. Secure your privates keys !!! Read about it
Support BTC Bitcoin run a full Node... if you can !
Have Cold Storage security such as Armory
Have a Hard Wallet
this a partial list: