So I am planning on putting 500 euros on Eth and Btc each(1000 in total) to hold for long term. Is it a bad time to invest in those crypto-currencies?
That's a good amount to invest. Those coins namely bitcoin and Etheroum are known foe each of their best on investment. Etherium is best known for short term investment and Biycoin is known for long term. Given these things, it shows that you did a great idea since both of the coins will surely be profitable for its investor.