Cryptocurrencies are new-age money that can be traded only if its user has a cryptocurrency wallet.
Unless there is a safe place to store the cryptocurrencies, like a wallet, there is no use. The development of a wallet should be managed carefully in order to ensure its security.
There are many types of wallets. Some might let you handle them and some custodial. Then, there are wallets that support only a single currency and wallets for multiple currencies.
If you are looking for Whitelabel Cryptocurrency Wallet Development services, then Blockchain App Factory is one company that is known for its high-end services. Get in touch with them and have a look at their website for more details.