Is it a good idea for an 18 year to hold saving in Apple stock?

Yes. I setup Roth IRAs for each of my children, and one of the first stocks bought was AAPL. It has done well, and for as long as Apple continues creating likable, useful, valuable products and services, I'm sure we'll keep adding shares. While you're young and you have someone to lean on, someone to help you with all of life's challenges, you should also work a job, any job, do anything to create some income of your own, and invest half of that income by adding to your Roth IRA, where you select whatever stocks of companies that:
1. are profitable and producing likable and valuable products

  1. innovative, they introduce new products from time to time, which again are likable and valuable

  2. steer clear of companies that are profitable, paying high dividends, but stacked heavy with old timers resting on their laurels and making fishy acquisitions of companies owned by their golfing buddies, because such old blue chip stable companies, those old rich guys are getting ready to bleed all of the wealth out of it, and leave a shell behind

  3. don't take the advice of Redditors, most of us don't know what the fuck we're talking about and those that are speak the loudest definitely don't know what they are talking about

  4. add some into an index fund as well, it's boring, it's often stacking lots of losing companies and a few big profitable companies will smooth out the losses, but by it's very nature, it'll "track the market"

  5. don't hold cash, for the love of god don't hold cash. Thank goodness you're seeing just how volatile and tamperable old money is. You're growing up in a time where geniuses have long since recognized how oppressive fiat is and they've invented new ways to store wealth, transparent, algorithmically balanced, efficient, and functional. I won't promote any particular crypto here, like stocks, you should do your own research, but you don't even have to do research to see how quickly the Fed erased EVERYONE's purchasing power on their wages, but also they devalued lifetimes of savings, which has already ruined many working class people and they don't even know it yet. They see big numbers in their retirement accounts, but don't have a clue how to compute just how much purchasing power has been stolen from them.

/r/stocks Thread