I've lived through the previous tech bubble, but was only an employee. It didn't really require a lot of cash back then to start up, depending on what you are doing. A shared server at an ISP or university and some perl scripts could get you going. Racks of modems in your garage to start a small ISP. What really drove the bubble was that larger companies would buy these small operations, often including shares in the bigger company, and package them together into a group which then in turns gets sold to even bigger companies like Cisco etc. Things also got crazy because a company's turnover could mostly be based on paying Cisco, Microsoft and Compaq money for equipment and software. I know some people who didn't sell, they remained small in comparison but are still in business today and doing very well.
My advice is that if you sell, make sure you get some cash for it to park somewhere to use during the bad times when raising cash will become impossible and skills will be cheap when you actually do have cash. Parking might mean an asset you can borrow against when it's hard to get funding based on a promise. Don't sell with any deal like shares in the parent, making an assumption that tries to time the market. Most experts can't even time the market right. Apart from that, keep making stuff people outside of the technology industry use and give them value that is worth paying money for, and try not to make it depend on things you get during a bubble: easy funding and clients with easy funding. Trust me those things are hard to determine, you only realise how much of your client base also depended on the bubble after it's over. Most importantly the effects of bursting bubbles take several years to unravel, so don't think that if you're still fine a year after it's obviously burst that you are in the clear.
That said, I think you are already at an advantage. During a bubble salaries are very good and it takes some guts not to get lured in by an easy salary and doing a startup instead. When the music stops and you are still turning some profit you will be glad.
My advice is that if you sell, make sure you get some cash for it to park somewhere to use during the bad times when raising cash will become impossible and skills will be cheap when you actually do have cash. Parking might mean an asset you can borrow against when it's hard to get funding based on a promise. Don't sell with any deal like shares in the parent, making an assumption that tries to time the market. Most experts can't even time the market right. Apart from that, keep making stuff people outside of the technology industry use and give them value that is worth paying money for, and try not to make it depend on things you get during a bubble: easy funding and clients with easy funding. Trust me those things are hard to determine, you only realise how much of your client base also depended on the bubble after it's over. Most importantly the effects of bursting bubbles take several years to unravel, so don't think that if you're still fine a year after it's obviously burst that you are in the clear.
That said, I think you are already at an advantage. During a bubble salaries are very good and it takes some guts not to get lured in by an easy salary and doing a startup instead. When the music stops and you are still turning some profit you will be glad.