1) BNB kept losing its value
It's a bear market, all assets are losing their value right now.
2) Till How much value (you think) that BNB can sustain
If the decline continues to follow bitcoin's decline, BNB's strong support is at $200 - $215.
3) What will happen to public funds, will there be liquidity issue if BNB falls to a certain level
If we're talking about venture capital funds, they were buying at such prices that even a drop to $50 wouldn't bankrupt them anyway.
4) What will be your way to save yourself if anything goes bad...
Either way, I'm not going to sell at a loss if anything goes bad. HODL and waiting for the bullrun.