The euro is a very reliable, safe and secure currency adopted by many platforms in the gambling industry. Top international casinos online that accept euro always have a wide variety of payment methods that are trustworthy, secure, and fast to use. You can make deposit in euro and play casino online, the list of the best and trustworthy is here:
The most popular eWallets are: Neteller, PayPal and Skrill. They are the most used by players.
It all depends on what currencies you have to avoid exchange fees.
In casinos with EUR the most popular methods are: eWallets, Bank Transfer, and Credit Cards.
Yes, in fact, most international casinos use it as their preferred currency.