When you think of coding money, you often think of Bitcoin. But now, Bitcoin seems to have become "outdated" and the following altcoin threaten Bitcoin's market dominance in the future. Here I am talking about the Nano(XRB). Nano can handle 7,000 transactions per second and this rate can increase over time and can even compete with Visa. The secret behind this is the block network architecture, which allows transactions to be processed extremely rapidly. This transaction speed allowed the Nano to become a potential co-dominant market for Bitcoin's pre-encoding market.
What do you think about XRB?
IOTA, XMR, and EOS.
I think for now, XMR has the best chance of making an impact in the real world stage. EOS and IOTA are all very scalable. Monero solves a practical issue that exists in anonymity, which is something that can be improved on top of bitcoin. Monero is one of my favorite long term coins to hold.
I wouldn't go with any of the hype coins, because usually, their tech doesn't have real world applications, and although they seem to have potential on the surface, deep down they really don't have any upside in the long term. (I'm talking Verge, etc.) Honestly though, BTC still has the biggest potential or chance at gaining worldwide adoption right now.