Hi! I need to know if it is worth it put concrete over my dirt crawl space? Any suggestions? I would really appreciate it.

You certainly can. You may want to put down some crushed stone first and then metal reinforcement. Draw a line around the walls as an indicator of your desired floor thickness. Some brands of concrete recommend that you spray it with water as it cures to avoid cracks. I never like to introduce moisture into a crawlspace that could have dormant mold spores, so try to limit the amount of water and direct it to the floor. Make sure you read the instructions and follow them to achieve proper results. Once cured, and a season has passed, you may notice the cement floor has separated slightly from the wall. Fill in these gaps with caulking.

i concreted my crawl and it was hard but worth it. my question to you is insulating a crawlspace. which way does the vapor barrier face? toward the crawl space or should the barrier face the floor of my first floor