What ever strategy that work for you that you are able to make small gain can be equally use to make huge gain if you really know what to do with that same strategy. And you shouldn't be too desperate because such mind will you to lose large sum of your money if care is not taken.
Yes, small gains will be based on the investment we do and the coins we are investing in. Every time the situation cannot be the same some time we may gain higher returns and sometimes we may gain lower returns and there is no specific guarantee we are going to earn the same amount every time.
Almost all people start from small gains so it's okay.But if you want to have really high gains you should invest in top coins