No, except in very rare exceptions. If nothing else, it signals to investors that you have doubts that the business will succeed and are hedging your risk. While it would be incredibly naive to think your startup has 100% chance of success, investors like to see that you believe it's almost certain that your company is going to be huge.
The exception is in later rounds where you're an absolute rocketship and investors are begging to throw money in even though you don't really need it. In this case, you may be able to grab a few million for yourself. Examples are Snapchat (which was a rocketship) and Secret (which looked like one based on growth numbers but ended up flopping). Unless you can honestly say that you have one of the absolute hottest deals out there, it's probably not a good idea to even suggest taking cash off the table.
If you really need the money, increase your salary.