We need not necessarily clean every road we see, things we handle, or sanitize everything that we have. But to consider money as a means of transaction is quite dangerous day by day.
That is right, one of the easiest media to transmit this virus is money. We don't know who the money is from and whether it passes through healthy people or is exposed to corona. Personally, I decrease the activity of using money as a means of transactions. Using digital money is better. Moreover when it can use the crypto, much better, but in my country, crypto is still illegal for the payment transactions.
There are some advantages that we could tell them regarding bitcoin being alternative to cash:
You have listed the advantages of Bitcoin compared to cash. It is actually clear enough. Bitcoin will help us better if it can be legalized as one of the payment methods. However, in some countries, it is restricted and illegal. The Bitcoin may be more and more famous because of this pandemic, however, about using it for means of payment, it will limit only in some countries.
However, hopefully, this pandemic can open the country to be away from such boundaries.