Coming This Way, Going That Way 〜てくる・〜ていく

Both sentences describe the same trend, rising prices, but てきました looks backward from now, while ていくでしょう looks forward from now. Neither verb is about walking anywhere, くる and いく have shifted entirely into marking the direction of change through time.

てきました reports a habit built up to the present, from university through now. ていこうと思います projects that same habit forward, from now through graduation and beyond, pairing naturally with ようと思う, which names an intention.