It'll happen when those interoperability protocols mature, I think. So far, Bitquence seems to be going in that direction. Not sure how extensive though, and technically, I'm not sure if its that easy to have something to stores everything, unless the community is incentivised to keep building / adding the modules..
Interoperability will sure be an issue and there will always be a few coins missing but it may be that you trust an exchange or counterpart with coins for the benefit of having them accessible in a wallet. Not dissimilar to having some of your coins on polo or other exchanges.
It'll happen when those interoperability protocols mature, I think. So far, Bitquence seems to be going in that direction. Not sure how extensive though, and technically, I'm not sure if its that easy to have something to stores everything, unless the community is incentivised to keep building / adding the modules..
Interoperability will sure be an issue and there will always be a few coins missing but it may be that you trust an exchange or counterpart with coins for the benefit of having them accessible in a wallet. Not dissimilar to having some of your coins on polo or other exchanges.