Welcome,
One of the oldest coins was bitcoins. Statistically it was a coin who survive, but the strange thing about cryptocurrency is the value. Even if there were coins going down, there were times they increased still 10 times for example Crypto bullion.
From the top 20 only two would be a lose, other coins still would let you gain something, however only if you hadn't purchased in the year 2014.
Have a great time.
~The ancient master