If someone intends to invest in this business, one should be very careful and have proper study of the crypto currencies, which he/she intend to buy.

Don't make decisions in panic.

Don't take decision in haste.

One should also be very clear which type of investment he/she wants to make i.e short term or day trading, medium term and long term.

One should invest only that much of amount which he can afford to hold for a longer period or afford to lose. 

If someone is willing for short term, he should have proper market research before entering into some coins. 

It is also advisable to have some analytical tools available in the market to form an opinion.

Another point where many of us make a mistake is that one should not invest all the money in one coin instead invest should be diversified.

One should not make all the investment at once in one time instead investment should be made in steps.