Hello,
I'd like to invest in some cryptocurrencies.
It seems BCH ETH XRP XMR are the top coins.
I have about 3000 eur, in what percentages should I differentiate my investment?

Thanks for your suggestions!
Spreading your investment between multiple coins is a right option in the first step.
If you want to take less risk, just give more percentage to more stable coin like XMR because the price movement is not too much.
But if you want to take more risk, you can allocate your most fund to ETH because ETH have more price fluctuations in the market.
Well, such a strategy will bring little profit. Even on a running bull. And what will the investor get? $ 10 Choose such coins as ETH they will continue to grow.