Worth or not as long as you can enjoy it. Dont be a low price hunter. Just enjoy from market speculation if you know what you are doing.
I agree with you perfectly except the "You cannot ecpect too much when you put small amount only to invest as the return is not that high". Dude small investments counts and matters a lot especially if you compound the profits; they normally end up being great investments if you keenly nurture it. A lot of rich folks today started from small investments, Bill gates, the Fedex owner, amongst others who had to invest little money before their investments grew to be this big so I'll never rubbish any investment amount really.