If Bitcoin price increases suddenly.
Does this change encourage buyers to consider investing in Crypto solutions like ICO platform or Exchange Software Development for their Business?
It depends on what the purpose that these software and platform will bring to the community, but since you mentioned ICO I doubt if it will going to have a demand, investors are leaving ICO for good in exchange to IEO and besides so many ICO platform are already online, but if the product is good even if there is no increase in price of Bitcoin investors are going to buy it.
That's not a problem if people option to leave ICO or IEO, much better if that happens. It could bring good impact to the demand of bitcoin, so the people will now focus actually with bitcoin. Unlike those days that diversion of investors with other coins due to ICO projects, has been totally devastating a lot of funds that goes to nothing. Once sudden price spikes would eradicate, we will see massive demand to further attract more investments.