Hello Daluxx,
There is not a limit to the amount of ERC20 tokens you can store on a single ETH address. However, we suggest you keep your private key to this address very safe. For example, by using a hardware wallet such as the Ledger. On the following website
here you can see how to use the Ledger in combination with MyEtherWallet.
With kind regards,
The Anycoin Direct team