my tipping point of when i realised bitcoin is going to last a long time and is growing in adoption was in 2012. those people from 2009 probably had their tipping point to realise bitcoin will be huge was probably 2011
and as the OP says his tipping point of revelation was a year after he got into it.
there are more tipping points every day. there is no single tipping point. just an increase of tipping points. and the more we see of these 'revelations' that people have that they finally see that bitcoin is going to grow, the faster it will grow.
Well the "tipping point" is a formal term for when a new technology or idea is adopted by the masses or reaches a level of adoption that the acceptance of that technology or idea cannot be reversed. So, it's not about one person it's about the entire community. When is there enough collective momentum to push the idea forward such that it cannot fade away?
You're right that a lot of positive moments contribute to that momentum and the (singular) tipping point is only one that can be truly known in retrospect, after it's happened, after the history of events can be analyzed.
It's a very exciting time, for sure...no one on this forum will argue that!