There should be no problem carrying it with you. The key depends on the size of your suitcase, that is, its length, width and height. Another condition is whether there are many passengers that day. Sometimes there are too many passengers, and the flight attendant will let you check in.

Under normal circumstances, you don't have to handle it. Just take it and get on the plane. When the flight attendant asks you, you say that there are valuables and you can't check them, so it's ok!