im about to invest in a bit of bitcoin as well as other cryptocurrencies such as eth, ltc, etc. Im thinking about making a wallet on a usb drive for a start. ive read about electrum but need something for all my crytpocurrencies.
If you are looking for that kind of thing, i think ledger nano s is the best choice, it can store erc 20 based token alongside with bitcoin and a few other coins, it is safe but the downside is you have to buy it first. It's not expensive if you treat it as a security measure for your investment.