Should I invest in crypto currencies?

Yes, you should invest in cryptocurrencies, but only invest what you can afford to lose because the crypto market is so volatile. You can invest more after learning.
At first you should invest only in the best crypto projects. They are less risky. On Coin market cap you can see cryptocurrency index, data and historical chart.
We usually buy low and sell high .If you are at a loss, never sell it. Selling at a loss is not a good practice. Patience is essential in crypto trading .Every coin re-pumps.
To be an experienced crypto investor ,you should be interested in cryptocurrencies and updates. According to Robert Kiyosaki (author of Rich Dad Poor Dad) “Investing is not risky. Being financially illiterate is risky“.
You should follow crypto experts on YouTube who are successful in crypto trading They also offer very useful crypto signals after their own research.