You can make that amount from trading and I don't see any other better to way to earn bitcoins in quick time but to earn 1 btc in short period you also should have a good capital to invest as higher capital will give you higher returns and you cannot expect that happening with a small capital.
If he must have higher capital to get 1 btc, then why he need to earn that 1 Bitcoin by the way? . Using small capital isn't impossible to get big return, also make sure you constantly check the price everytime because sometime there are a price spike would be happen.
If he wants to earn 1 btc by earning and not going for trading then it will take so long for him to earn that amount but if you have capital to invest at least 0.1 btc then there is a possibility that a coin can go 10x in future which will help you in earning 1 btc in quick time.