I was wondering what's minimum / ideal amount of BTC or ETH I should have in order to start trading activity
If you have any idea or just want to share your first experience in crypto trading, feel free to write them bolow
I would recommend starting out with a small sum like $100-200 and trying to make short term profits by investing in altcoins as the Bitcoin market has seen a significant crash lately. This would ensure you experience and with the right choices and timings, you will end up with some profit too. Just look around in the altcoin section for potentially up and coming coins and divest into multiple alts just to be sure that you won't go down in one bow.
I agree. You need to actually have a substantial about to trade because having only a little would only limit the trades you can do. It's like going to a war with very little fire power. In trading, it would be better to possess a good amount because you may not know if the opportunity would come that would need for you to trade in a big amount for a bigger profit.
Having very little is of no use or value. Maybe you wont be able to trade as different exchanges have different minimum trading limit. Actually if the OP has very limited resources to trade, then he should wait and get a considerable amount so that he can be able to get profits, other the money will just be lost in moving the coins in and out of exchanges as withdrawals from exchanges has higher fee.