Keywords for swap interest to create user index to ease the search for swaps.

It is hard to find someone who owns and wants to trade a specific group of coins. usually, such information is written in the profile but not indexed and used to search for users based on their interests.

It would be nice to add such a feature where the user identifies some popular keywords to be used to filter users based on some criteria when looking for swaps.

It will be easier using this feature to search for people looking to swap euro coins for example.