As long as you keep your eyes, ears and wit open, every destination is safe. There's always an element of surprises when you're traveling and it becomes even more challenging when you're traveling solo. Have a great trip. PS: Don't accept odd invitations from strangers.
It would be very safe to consider a solo trip to Goa. Its beaches, churches and casino parties are the major attraction here. And almost in every parties, very hale bodyguards are there to protect you.
I went for solo travel in goa over new year, this year only at the time when you can find the city to be crowded enough, so yes its safe and not that expensive if you know to how to ride and prefer public transport over cabs and hostels over hotel.
It's quite Safe to travel Solo in Goa as you will find many foriegners solo traveller there. The place is party hub for them. Places like Goa is more fun with friends because of the party life there. Beach days and Clubbing and shack parties. solo is also fine though. 👌
Happy travelling 💗