No doubt that if you are investing a bigger amount then your profits will also be bigger but this does'nt means that the investors who can afford only a small capital to invest , can't make profits in crypto.It simply depends upon the skills and experience of the investor.If the investor is not that much skilled, he/she can never earn profits even by investing a bigger amount. If an investor is investing a small capital at a right time and is having enough patience to hold until the prices rise to a good value and then selling it, then no one can stop him from earning big profits.