The most notable advantages for businesses in taking up Cryptocurrency is the high likely future returns.
When you say future returns, it comes to mind that everyone can be able to face the market reality but no, only those with full confidence and patient can enjoy the high market return when they venture their business in bitcoin, not just any cryptocurrency.
Cryptocurrencies are new compared to Fiat currency, and so is their market values volatile. However, their volatility comes with prospective good gains. Another benefit is cryptocurrencies can be use to reduce payment sorting costs, giving room for small businesses to retain in their possession more of what they get and significantly increase in the rate how fast they get paid.
You made a lot of comparison of digital asset and its simplified means of payment to Fiat currency. But generalising the term to just cryptocurrency makes it a thing of thought. All this can be achievable with bitcoin and not just any cryptocurrency.