I have heard of many people and companies having their bitcoins lost or stolen.
That being said:
What is the safest way to buy and store bitcoin?
Thank you
You can buy bitcoin at coinbase.com or find a legit seller at localbitcoins.com. You can also buy bitcoin to a people directly who sells bitcoin. One of the safest way to keep your bitcoin out from hacker is using a hadware wallet like ledger nano or trezor wallet. Offline storage is the best bitcoin wallet.