Why You Should Not Use Coinbase?
Transacting bitcoins on Coinbase may be worse for privacy than even PayPal. And it's because you also compromise the privacy of people who transacted with you. Then there's the issue of high fees. Coinbase's convenience and ease of use come at a cost: when you buy bitcoins, the fee is 1.49% to 3.99%.
Yes, Coinbase is widely considered to be one of the most reliable and legitimate cryptocurrency exchange platforms on the internet.
Coinbase Review - BitDegree
Can my bitcoin be stolen from Coinbase?
Coinbase carries crime insurance that protects a portion of digital assets held across our storage systems against losses from theft, including cybersecurity breaches.
How is Coinbase insured?