Out of hundreds of cryptos, http://ibm.com chose http://stellar.org to handle it's blockchain payment systems.
You think any other Fortune 100 companies are looking at Stellar right now?
XLM should be in the top five by the end of 2017. Absolutely, agreed. Not sure why you're posting this here though. I don't see Lisk and Stellar as direct competitors.
Stellar is competing primarily with Ripple. Based on market cap, I'd say Stellar's potential for gains is far higher than Ripple's.
I see Lisk as competing with Stratis, Qtum, Ethereum, NEO, and EOS. Whichever one produces useful scalable dapps first wins. So far nobody has produced anything really useful except Omni, which has a smaller market cap than multiple individual projects built on it.