Getting to hotel by Taxi will cost you more compare to bike
If you have few bags to carry then will recommend you to hire bike to ride to hotel.
Hiring Activa will be the best option. You can keep bag on the front side and can put extra things under seat storage.
If your looking to get taxi to get to the hotel then you might also need taxi to get back to the Airport, and this will cost you more money.
Taxi will give you some comfort, bike may not. But hiring bike have its own advantages. You can go wherever you want, whenever you want, you are free to ride around city, explore goa like never before. When everything is done, return your bike and catch the flight.