Rich Man, Poor Man, Beggar Man, Thief
He has learned, from listening in cafes and in bars, that Steve Rogers has come to the future with him, and that he is working in SHIELD, and SHIELD is, was, one of Hydra’s many heads.
He knows that Steve Rogers has disappeared. That he was summoned to a hearing and did not attend, and this has made the news. It did not escape Bucky’s notice that Steve Rogers is a match for him, even with the metal arm. It is not outside the realm of possibility that Rogers is going to try to recover the Asset. It may even be that Steve is an Asset himself.