Have online monetary scams ever faded away, even with the approach of strong high technology by banks and security organisations?
Since the beginning of online transactions, there have always been scams, so it does not end or start with crypotcurreny. Whatever extra security or technology introduced for protecting online scam will not be 100percent effective if users don't play their part. You can take extra measures by inputting 2FA and strong pass phrase password, if your coin is always online; it is highly vulnerable.
You're right. As long as it's related to money, scams will exist forever. And it doesn't matter what form of money there is - cash, money in bank account or crypto.
You can take all precautions, but scams won't be gone. It's impossible that 100% of peoppe will be extremely careful and will take all precautions. And also, scammers are getting more advanced too - they always will find new victims.