Yes, there are a lot of scaling issues with Bitcoin but, I guess even Ethereum also have scaling issues. Both of them are very famous but, when it comes to real life product development both of them will fail due to its scalability. Here i want to mention this project which is currently under development called Smartmesh Ecosystem. They are trying to solve the scalability issues using Mobile Raiden. (programmed in Go language instead of Python as its highly optimizable). When this project is completed then there will be no issue of Scalability. The main idea of their project is "Off-internet Communication and Off-internet micro-payments". To implement this project Globally its must for them to solve the issue of Scalability which they are doing it efficiently.

Here is the detail of SM-Chain
https://medium.com/smartmesh/testnet-of-smartmesh-public-chain-smchain-is-online-on-march-15th-bee4a53dc998

 A smart contract is a computer protocol intended to digitally facilitate, verify, or enforce the negotiation or performance of a contract. Smart contracts allow the performance of credible transactions without third parties. Every Blockchain needs a tool for auditing its smart contracts now almost every crypto company having their own blockchain is using Smart Contracts to verify and validate all the transactions.