Hello everyone as the title says ^
Do you store your bitcoins online or on a wallet on your computer, perhaps cold storage?
Are bitcoin wallets safe?
That depends on the version and format you have chosen, and how you use them.
The safest option is a hardware wallet which you keep offline, in a secure place. That way there is no risk that your account can be hacked, your keys stolen and your bitcoin whisked away. But, if you lose the wallet, your bitcoin are gone, unless you have created a clone and/or kept reliable backups of the keys.
The least secure option is an online wallet, since the keys are held by a third party. It also happens to be the easiest to set up and use, presenting you with an all-too-familiar choice: convenience vs safety.
Many serious bitcoin investors use a hybrid approach: they hold a core, long-term amount of bitcoin offline, while having a "spending balance" for liquidity in a mobile account. Your choice will depend on your bitcoin strategy, and your willingness to get "technical."
Whatever option you go for, please be careful. Back up everything, and only tell your nearest and dearest where your backups are stored.
For more information on how to buy bitcoin, see here. And for some examples of what you can spend it on, see here.
(Note: specific businesses mentioned here are not the only options available, and should not be taken as a recommendation.)