If someone wants to continue investing from their emergency fund, then they will have to face many types of pressure. For example, if for some reason they get sick and need their money immediately, then they may have to sell their investment. This can create a conflict of interest towards the investment. In the case of investment, buying investments with emergency funds will never be a wise thing to do.
The huge risk they might encounter is they face on huge risk for experiencing heavy liquidation if the emergency situation will happen. That's really bad experience to had since all their efforts made will be useless since they will force to sell maybe large percentage of their holdings just to meet their needs in that situation.
That's why its never been advisable for investor to use their emergency funds and separate it so that they would have something to get when they experience a problem that need an immediate response.
We should not waste the opportunity for acquiring bitcoin at certain prices that's why its really better for investor to be prepared on any situation so that their investment will not get affected and they have good chance to succeed and can acquire more Bitcoin in future.