The perpetrators may launch social-based attacks (social engineering) against Twitter employees. Hackers access Twitter's internal systems and devices, and thus successfully tweet the Bitcoin giveaway.
For example the Kanye West account which was also hacked. The famous US musician is "tweeting" he will duplicate the Bitcoin sent to his Bitcoin address. With common logic, it is unlikely that anyone would give free money in the form of Bitcoin, without any veiled intentions.
Yep you’re right about that, no one is ready to give you free money, I just don’t know why people are falling for these type of scams. Is it that they don’t know that people like Bill Gates no matter how rich they are, they cannot just wake up in a day and come online and start giving out free money, that doesn’t happen. And the worst part of it all is that people were dumb enough to the extent that they were all told to send money to those addresses to be doubled and they agreed to send money

. It’s time for everyone to wise up and stop falling these well-planned scams.
The reason why I am calling it a well planned scam is, scammer were making use of 3 things: covid19-High level people's twitter account-bitcoin. If they missed any one of above three, then thy may not be able to achieve what they have planned initially. Victims might have believed that due to pandemic, big people are sharing their wealth and for knowing our addy and how desperate they need money, they might have assumed about that "doubling" part.