I hard to tell which crypto currency is best at the movement because these are highly unpredictable/ volatile.
Decentralized technology is still new to the world. Its market penetration and adoption is still negligible.
With the passage of time as more and more people are aware of this technology, it is becoming more and more popular.
Now even many countries has started accepting this as currency and many other are in the process of adopting.
So in future a more countries will jump into it and it will gain more trust of people. Its value will also increase.
Honestly speaking, crypto has still lot of potential in it. Especially if someone is targeting it for a longer period.
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.
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.
It seems that prices are at the lower side and eventually will go up if invested for the longer period. The point here is one should invest only that much of amount which he can afford to hold for a longer period.
If someone is will for short term, he should have proper market research before entering into some coins. It is also advisable to have some market to form an opinion.