If i will be given a chance to do a project with cryptocurrency then i will be making an all in one digital wallet for all crypto that includes bitcoin and all altcoins using same wallet address. I have seen too many digital wallet from known digital wallet for ERC20 tokens and for bitcoin digital wallet but i never saw a digital wallet that will cater all the digital currency either bitcoin or altcoins. If i have only the capacity to do it like having a good team developer and a financer then i guess i could make a revolutionary digital wallet.
there is a wallet that already have all this features you just mentioned maybe you have seen or heard of it. its called coinomi its available of android and IOS, you can download it and see for your self.