Today on february 2nd, 2020 Twitter added the Bitcoin logo to the Bitcoin hashtag!
If you write #bitcoin it will add ₿.
Jack Dorsey the founder of Twitter is known for taking part in the Twitter Bitcoin community and showing his support. That for it’s no surprise that his Twitter profile displays #bitcoin ₿ today. In the same moment he asks unicode to add the Bitcoin logo.
If you don’t know what unicode is, read more at the following link: What is Unicode?