I can not now trust my bitcoins to anyone. I lost a lot in HYIP. So I decided to just hold bitcoin. Now I do not want to spend it. Maybe in the future I will change my mind
You lost your bitcoins in the past because you invested at a wrong place but there is no risk in spending bitcoin for buying or for shopping you can easily spend it but if you have made your mind not to spend them then keep your bitcoins safe in your wallet.
If purchasing something through the forum here then always use an reputable escrow provider, some are free and other charges a small fee but it is worth the piece of mind.
The thing is, while bitcoin is getting popular there are third party businesses who would like to make online transactions safe and more faster for us.
Unless these companies like Coinbase are offering insurance on human error there is no need for them when you know what your doing.