lose bolt no seriously its probly your alinement is off
Wheels are out of balance
shifted or broken belt in the tires
You may have a bent wheel, defective tire where a steel belt has shifted or broken, worn steering parts, and possibly a defective wheel bearing.
If the steering wheel is loose while driving the steering rack may be going bad. A bad steering rack leads to a lot of play on the actual wheel.
Tires out of balance, bent wheel, worn suspension or steering parts, bent driveshaft.
Wheel balance may be off...
Your tires are bad or you need an alignment. Get your tires checked, they may need to be replaced or rotated, and you can check your alignment by letting go of the steering wheel while driving, if it drifts left or right significantly, you need an alignment.
Sounds like wheel imbalance or possibly a bad wheel bearing(s).
Power steering fluid helps your steering wheel turn easily. If you have dirty power steering fluid, it may be hard to turn your steering wheel while driving.
The steering wheel wobbles, because of the unconditional pressures from the ground that is adjusted at speeds when it reflects gravity.
You may have a ball joint going out or your wheels are unbalanced
Grip the steering wheel firmly.