I'm basing this claim specifically off total transactions per day/month/year. Take a look at the graph from my last comment. Based on years of data, it's highly probable Kin will become the most used crypto in the world once fully integrated into Kik. Unless Bitcoin and Ethereum see substantial increases in their transaction count over the next 6 months, it very well could happen.
I'd like to hear your reasons why you lost confidence in Kin specifically. I'd also like to know why you think Bitcoin and Ethereum can't give up that title? Ethereum was able to pass up Bitcoin... why can't something else pass up Ethereum? I'm not talking about marketcap, but just which coin will have the most daily/weekly/monthly transactions.
We split even that part, let alone Kin, Ethereum is not going to pass Bitcoin in any area. Bitcoin is the safest crypto currency ever and that won't change in current market roles. Big money never transit to another crypto currency that is already in the business. I think Kin focus on passing Eos and Neo type of coins first. Your prediction is too short term, I don't think any big change will happen only in 6 months.