Are cabs safe in Barcelona?

[mentira]

Hey guys, so I'm just drafting up the formalities of my intinerary, and I found that no matter what I do, travelling from Nice to Barcelona will result in my arriving around 9:45, I'm staying at the BCNHello hostel, which is about 8-10 minutes away by car. I was wondering if you found the taxis safe? I'm 17, and a single traveller, which is why I'm asking. If anyone has stayed at the hostel, do you know if they can do pick ups from the train station?

Thanks everyone

-A very nervous and paranoid Alli