I was up to seven last year and I realised it was madness because I only play one bass at a time. I don't gig anymore and don't have the inclination to start. They were mostly piling up in the wardrobe and not being used.
It was a long term itch I wanted to scratch, having an arsenal of bass guitars, but once it was assuaged I came to my senses and sold them all except one.
I had a CV Jazz and a Jap Mustang, both of which could have happily been 'the one', but I settled on a preloved, lightweight and slightly roadworn example of Pro P.
The moral I took from the story is that you have to play the field a bit before you settle down.