A printed out Bitcoin wallet. Laminated so I don't have to worry about fading, water damage, etc.

My wife has dementia and I've had to quit work to take care of her full-time. We get by, just barely, on our fixed income. The most frustrating thing about our situation is the "requirement" that we NOT exceed the maximum allowed income for her to remain qualified for Medicaid. This would include any money in a savings account. Bitcoin seems to be an ideal way to build a savings account without the worry of saving cash in our house. Would a laminated paper wallet be the best way to secure it?