I wouldn't say I'm an old-timer by any metrics, but even back in 2012 when I first discovered and joined HN, I remember it was pretty clear in the community (and people I spoke to around me) you shouldn't go to work at a startup if you were looking for "a lot + safe" money.
Sure, you could belong to the 0.001% and work on the next Dropbox, but most likely you would end up not, so don't start at a startup to chase riches, as there are better venues for that. Do work at a startup if the environment/mission/team feels right to you, but with no expectations of a big payday-exit.