To answer a few of your questions, you won't be able to buy gold in a 401k, you can only buy the limited funds that are offered in a 401k. You can buy gold in a "self directed IRA". As far as gold being on the rise, it's actually only been on the rise again in the last couple of weeks. Here is a
chart showing gold prices over the last 8 years. You'll notice that it has "topped" 2 times this year and then has declined quite a bit since then. Most experts will tell you that once you see an investment "double top", it's generally not a good time to buy. In my opinion (and it's worth what you're paying for it) you don't want to buy when gold is at historical highs.
If you do decide to buy, you can either purchase gold directly and hold it or you can buy gold mutual funds which invest in the companies. No matter what you do, check with an actual investment advisor about all your options, don't ever buy from a company that only sells precious metals as they have 1 goal and that's to sell you gold.
It's normal to be nervous when the stock market is so rocky but either look at it as a buying opportunity, keep it in cash or diversify in other types of investments.
Email me if you want a referral to my advisor I use in Dallas. He can handle any type of investment and has over 20 years of experience. No matter what you decide, just make sure you get advice from pros and not just a bunch of photographers.
P.S. And, yes I do have some gold but it was purchased when gold was in the $300 range.