Do you want PS5 to be released soon?

I highly doubt it'll release now. Sony would be the biggest fool if they release it now. I personally think it'll release in 2020 at the EARLIEST. Though I wouldn't care whether it releases now or later. I wait a long time before I buy any console. I still haven't bought the Switch, and for a good reason. One I need my grades together to convince my parents to buy it (or hope my brother has money stacked up to buy me one), but I also like to wait for a good library on any console to avoid droughts.

Was one of the causes of the video game crash of the early 1980s was due to many home consoles appearing in the market in a short period of time?

Nope. I'll play my Pro for as long as I can, whenever I'm ready for PS5, I'll buy one asap.

2021 would be my guess.