i did a little research about some altcoins and i stumbled on Cardano. After reading up it happens to be my fav, here's why
It is the first blockchain to be developed from a scientific philosophy. It originated in 2015, over the past years the team have been doing academic research globally by leading academics as well as professional engineers to address fundamental issues with scalability, sustainability and regulation on Cryptocurrencies as well as develop their own blockchain technology. Cardano has really considered the implications of scalability into their project.
As more users are interacting with the Cardano blockchain, the transactions per second will increase. This therefore increases the computing power needed to quickly process the transactions that are taking place. Currently, many blockchains require a copy of the entire blockchain while processing a transaction, which will slow down transaction time drastically as user adoption increases. Cardano aims to mitigate this scalability issue. I'd recommend reading their 'Why' page:
https://whycardano.com/#scalabilityEveryone's views are different, whats your own fav?