He can’t keep up

My boyfriend and I are the definition of opposites attract. I have a very ambitious personality and I love adventure when I see something cool I want to do, I do it, and make plans to make it happen. I’m not the type to say oh that’s cool maybe I’ll do that one day, I just go for it. My boyfriend is the type to say oh ya maybe next year or no not now but one day. He lives for “one day”. I love this man and every other aspect of our relationship is perfect, I just worry that he won’t be able to keep up with me one day. I worry that down the line he won’t want to travel the world and go on adventures with me. I could bring it up now but he’ll say “we will one day”. Is this a problem that could ruin our future together? How do I get him to stop living for “one day” and start living life to the fullest???