The proliferation of cryptocurrencies in recent years has prompted the launching of many hot cryptocurrencies-wallets (known as "hot crypto-wallet", permanently connected to the Internet) services to facilitate the management of cryptocurrencies assets. However, the dark side of cryptocurrencies, such as possible illegal activities and difficulties of key management, may hinder the broader cryptocurrency adoption. Therefore, some hot crypto-wallet services providers have adopted different measures to mainstream their services. Using a qualitative approach, we identified four mainstreaming strategies of hot crypto-wallet services, which may hint at some practical implications for hot cryptowallet service providers.