getting more people involved and using the platform will need the price to go up alot
Not necessarily. There are a lot of use cases where the price of HZ doesn't matter, and even some where a low price is favorable.
Liquidity is the major factor, more so than price. I would think that most use cases of HZ would require being able to exchange back and forth between other currencies/tokens with ease and minimal slippage.
Again, not necessarily. HZ is a toolkit, and a low token price helps to issue assets or currencies and send them around, or cast votes. Assets and coins don't need to be tradable, for coins it's even possible to disallow it.
The only one who needs a high price and liquidity is someone who wants to sell a bunch, for example crowdfunders. There are at least two external projects in the making that I'm aware of, where an asset/coin will not be created to be traded on an exchange. Bitnation and E-Estonia also don't offer monetary services (yet), but they use the blockchain for transactions.
Of course liquidity IS an issue, but one that's also being worked on (i heard...)
if Assets and coins don't need to be tradable how do i buy asset or coin or sell ??
i did read in the slack that the hz foundation wants higher price or they go bust ?