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 $30 may likely loss more because of the money is small. Blockchain has the minimum amount one can invest if am not mistaken but if your amount is too small may be difficult to make easy progress.
What do you think about my advised to him?
The more capital you have for investing in the cryptocurrency market, the more profit you can earn and then you will need a good amount of money to invest in Bitcoin. If you want to start investing in Bitcoin with such a small amount, then apparently I don't see any point in it. 30$ can only be used in centralization exchange to make profit because there trading fee is low and you will be given feature of direct deposit and withdraw to fiat. If someone want to buy at cold wallet then I will suggest to wait and when your fund increase then invest to make proper profit.
With such a small amount, if anyone wants to start investing in the cryptocurrency market, it would be better for him to invest in a small coin whose market value is less than one dollar and have a low fee for swapping. For such a small amount, he can get a large number of low-value tokens.And as the price of the token increases, it will also see a profit.