For normal trading you can do bitcoin trading but you can do altcoin trading but in that you should do full research and then enter, margin trading is high risk but at the same time it will also give high profit also. So everything is upto you to decide which way you want to go.
I think that with small budget, you can make small money by investing and day trading the coins available in the market at low cost. ETH, Ripple and Altcoin can do it for you.
However, ICO would have been another great option but since we have had some scams lately, not everyone would prefer to go for a good ICO and by the way finding one with great potential and a nice project is not that easy as well.
Well, crypto trading or investment is not that easy as you said and the last I check ripple which was among the altcoin you mentioned was never a good coin which crypto trader can invest in anyhow. Aside that, you even don't look as someone who's smart in crypto trading .