TRON is one of the very promising altcoin, it is well worth the investment. However, if choosing between TRON and Cardano I would definitely buy Cardano. Cardano is one of the altcoin experts appreciate. It has the perfect blockchain technology, professional leadership team, great support community. Cardano has high scalability, it fixes many Bitcoin and Ethereum errors. I believe that in the future, Cardano will become a new force in the crypto market in the future.