Is it technically possible to create a desktop wallet where we can store all crypto including bitcoin and all existing and to be launched coin in one wallet? I know one can keep them in online exchanges but it is risky.
To be launched? If it doesn't have a blockchain, it cannot have a wallet.
Now, for the existing ones, it can be done, but it's quite some work and nobody will use it.
Just imagine how big is the blockchain for Bitcoin to load. Now, each coin has its own chain, which has to be downloaded. Each coin has its own daemon in a way or another which will have to stay in memory.
The result will be something big that needs a lot of resources and which nobody will fully use, since nobody cares of ALL cryptos. Even the small exchanges de-list the coins with low volumes to free resources...
