Oh sure. Why wasn't this done from the start? ;)

A common BTC will be the stable of tomorrow, Interlay and Kintsugi can be the pioneers in this niche.

Perfect... iBTC on the Polkadot Chain and iBTC on the Kusama Chain

I like this idea! It's not much confusion for the DotSama ecosystem but once Interlay goes to other chains, it's best that there is one common Interlay BTC product. 

iBTC

Polkadot ecosystem have a lot of followers, fine! 
But, nowadays not seem a good idea speak about stable coins... :-). 
I know that it will be necessary for us, but i think is better wait for Bullish Market...

Although I don't know technicalities, this sounds great!! Go for it!

I disagree.
As stated in the documentation, kBTC's collateral assets consist of tokens that are illiquid or risky.
iBTC, on the other hand, only strictly defined tokens can be collateral assets, and there is a crucial difference between the two, each having uses in different directions.

Merging them would add poor quality assets to iBTC's collateral assets, which would have a negative impact on trustworthiness.

It is on everyone's mind that several stablecoins, such as LUNA, have recently experienced major crashes.
Therefore, in the current environment where the credibility of stablecoins is being questioned, merging kBTC and iBTC would have a negative impact.

Acala vs Karura has a common stablecoin aUSD, so why does Interlay vs Kintsugi not have a common BTC, it will increase capitalization and influence!

Merge iBTC vs kBTC