This is the ultimate gift ideas for your LGBT friends.
Although people around the world have been increasingly open and supportive of LGBT, this does not mean the disappearance of prejudice. In many communities, many people still suffer from prejudice or fear of prejudice. By giving your bi friend's a gift of pride does not mean asking themselves to show publicly but give support to them. To let them know they are accepted and loved.
This is not mean we need to get some expensive jewelry, actually, the most important thing is the identity. Such as earrings, necklace, bracelet, ring are all okay for that. Search with "bisexual + what-you-want" on Google or other sites you love to browse.
Some accessories are not very useful, but some are. Stickers, pins, flags, and so many more.
This could be the most useful I think unless you bought something with highlights of identity. The signs might require, but not necessary. Any big online stores stocks these, choose one you like to get.
A gift is to show your love and friendliness with your friend. So there is nothing important than your support. Show it to your bestie.