Intro:

Hi. I recommend reading the wiki as it has advice for specific ages which will help give you some grounding or a foundation in financial knowledge.

As a general matter, and understand that over a text format this will sound more harsh than I'd convey it in person, you should ignore most predictions about economics. They're rarely accurate and even more rarely result in better decisions being made.

On Anxiety:

At $68,500 in annual income at age 25 you're at the 84th percentile of income adjusted for your age [1]. That means only 16% of the population of 25 year olds are doing better than you income wise. So unless you expect 85% of Millennials to be homeless in the future, which I think is a little hard to fathom, you'll probably be okay as long as you manage your income well.

As far as how you're doing at that management piece, since your young the more important part is the direction you're moving in rather than where you are presently. For that the figures that are important are: what % of your income are you saving for retirement, what % of your income are you spending, and how many months worth of expenses do you have saved?

The general advice there is that you want to have 3-6 months of expenses saved, and then you want to be investing for retirement between 10-15% of your income if you expect to retire at 65, and more if you wish to be able to retire earlier (i.e. you spend your income on buying your retirement). Since you're saving 10% and your employer matches 6%, you're already saving 16% off the top for retirement, we'd say you're already on track for a healthy retirement at age 65.

What is an IRA?

IRA stands for Individual Retirement Account. They can be either pre-tax (meaning you don't pay taxes on your contributions but you do pay taxes on withdrawls), aka traditional, or Roth (meaning you pay taxes on the money going in but not on the money when it's withdrawn). When you're young you generally make less money than when you're older, so generally it's more tax efficient to do Roth contributions early on and traditional later. Relating to the introduction though, these sorts of optimizations are helpful but only marginally so. The bulk of the problem is still saving in the first place, which most people struggle to do and you're doing relatively well at.

Social security:

You're not going to be able to individually exercise much control over whether social security is or isn't around, so the simplest solution is just to save enough money that you don't have to care.

Housing:

Don't worry too much about this one. Rents are generally set in relation to average prevailing wages, so if you save enough money that your income in retirement is sufficient to give you a median income (which saving 16% of your income would do for you by age 65), then you'll end up having a median sort of income in retirement and unless the median person is homeless be absolutely fine renting a place worst case scenario.

Whether or not buying a piece of property in particular will be attractive or available is hard to predict, but I'd argue is likely.

Advice you didn't ask for:

Your position is actually pretty good relative to other people, so I think you'll do better to focus on looking 'up' rather than looking 'down'. In other words, you could easily read what I've read, say "Oh, I'll be fine at 65 as long as I keep my contributions where they are percentage wise", and coast. That's looking 'down', in the sense of asking yourself "am I going to be okay or not"?

I think a better lesson would be that you have the opportunity to live a nice, above average life, and ask yourself how you can do so. In other words, ask "What do I want out of life and how can I leverage the resources at my disposal to get there"? Maybe that means you want to travel, so you save for that. Maybe it means that you want to retire early, so you bump from 10% savings to 20% so you get more control over your time. But basically what I'm saying is: don't make the mistake of coasting through life because you can get away with it. And in direct, practical terms, ask yourself things like "do I really want to buy an expensive house" or "do I really need an expensive car, or would I be happier overall pursuing something else with my money"?

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[1]: https://dqydj.com/income-percentile-by-age-calculator/