You will still retain your shares, it will just be in a private company. If you don't wish to hold a private you sell your shares on the stock market before it delists.
if you hold your shares, you take the chance that as a private company it will eventually have another liquidy event where shareholders are offered a price much higher then the current price.
IMO I think it's a great opportunity if you don't mind not having access to your capital for the next 3-5 years.
IMO DYOR Etc etc
SPT Price at posting:
4.3¢ Sentiment: Buy Disclosure: Held