The price of the crypts are very affected by speculation and there are some that handle so little transaction volume, that movements that do not reach 50 million dollars cause their price to fluctuate in a scandalous way.
You can only expect to make greater profit when you have invested enough of the money into any of the crypto currency and that you have this much of knowledge regarding the things which can help you in having a better earning. However, there is no need of investing big in the start and that you should only invest more money when you are dead sure about that you have learnt all the things and now you are able to take such risk.