Someone ask me a question after introducing bitcoin to him, if he can start up with $30 and grow with it but I told him bitcoin is wide and high in volume, price and market, that's means whatever you're starting with determine the outcome of the market like for example; if you start with $30 and eventually the market goes up to a little increase of $32 can not be compared with someone who started same time with you, at the rate $100.
So also when the market is down to some extent, the person with $30 may likely loss more because of the money is small. Blockchain has the minimum amount one can invest if am not mistaken but if your amount is too small may be difficult to make easy progress.
What do you think about my advised to him?
Well, you are wrong, and this is because your advice is not clear enough, and also not exactly the truth.
And simple, yet a straight forward self explanatory advice would have been "the more money invested, the more profit you make if you assets increased in price, likewise, the more money you are likely to lose if the price of the asset drops", but also remember that even if the asset price drops, you are not in lose, until you sell, this simply means that, as long as you keep holding, there is always a chance that the asset price will recover and yield profit for the holdler.
More money invested in bitcoin will mean more supposed loss, if the price of bitcoin drops,
So also, more money invested in bitcoin will mean more profit, if the price of bitcoin increases.