I need some advice, I had some crypto a few years ago and then sold it and made some good profits and I am now planning to buy some crypto once again and I admit that I am outdated on the crypto world right now. Can someone give a brief explanation of what DeFi is and what are your top 5 coins/tokens and where do you usually trade it. Thanks! 
if you have a understand about how to choose the new altcoins to invest,
i think you can choose a new alt with huge potential, but if you don't know how to choose the right alt, its better for you to drop your money in the TOP altcoins