Thank you for your suggestion, I am a little worried about double payment. They said they would double the payment.
“
Ipsa scientia potestas est.” — Francis Bacon.
You can't double spend bitcoins if you transact through the lightning network just like you can't double spend cash in real life. You should make your own research for everything and let no people manipulate you with their opinions.
Is it better to use cash instead of Bitcoin for micropayments?
Better in what extent? Privacy? Well, obviously, if you pay someone hand-in-hand, you leave no footprints to the internet about that transaction. But, LN makes Bitcoin more private. Your transactions aren't publicly announced and thus, no authority can analyze them for their purposes.