Earning passive interest just for holding bitcoins (risk free and passively)

I've been doing some altcoin trading recently but exams are coming up soon so I thought to convert everything into bitcoins and find somewhere to keep it and hope it increases in a few months. However, I thought that wasn't good enough so I looked up some places that hold bitcoins passively and gives you interest, the place I found was the best in my personal opinion was actually a bitcoin faucet: freebitco.in! There are other sites that offer better potential interest rates but some seemed sketchy and some weren't passive. (My referral link: https://freebitco.in/?r=7664203), (non-referral link: https://freebitco.in/?op=home)

If you use the referral link message, I'll give you a minimum of 50% (I'll change it depending on how many people use my referral link, the more people using it the higher the percentage) of the profits I make back to you!
I get 25% of the interest you earn so I keep 12.5% and you get 12.5% back, thus multiplying your interest by 1.25

Interest rates
Currently, they give an interest rate of 4.08% (4.59% if you use my referral link) compounded daily which is better than what most banks give (around 2-3%). Furthermore, bitcoins will most likely increase in the long term future in my (not very well researched) opinion, thus realistically the interest you get would be more than 4.08% (or 4.59%).

Things to earn more bitcoins on the site
You can just leave your bitcoins there and earn interest, but you can also actively do things to earn more!

Free bitcoins
Since it's a faucet, you can claim bitcoins (hourly)! They offer a minimum 0.2cents worth of free bitcoins every hour (up to 200USD but that's a 1/10000 chance), by proving you're not a robot then pressing a button. Furthermore, you also get lottery tickets for claiming free bitcoins putting you in the running to win up to around 2-3 bitcoins every week. Though the chances are pretty slim, it doesn't hurt to be in the running. Also earns you 2 reward points (explained later).

Gambling (10/10 not recommend)
If you're feeling lucky, you can try your luck on their hi-lo game (proven to be not rigged but doesn't guarantee you from terrible luck)
Personally when I was trying out different sites and putting in a few dollars worth of bitcoins here and there, I lost all of my bitcoins I put in on this site. I put payout of x2.1 and doubled my bet each time I lost and lost like 16 times in a row on a 45.24% win chance lol. I've learnt gambling is bad. However, my friend did put in around 0.1bitcoins and now has 0.3bitcoins after gambling for 3 hours straight using the same tactic stated above haha

Reward Points
Like an altcoin used on the site given to you by being active. You can exchange it for timed bonuses, bitcoins or other stuff.

deposits/withdrawals
Deposits are free!
Withdrawals are free or charge a fee depending on the type of referral, detailed below.
Auto: every Sunday, free!
Slow: 6-24 hours, 0.00004570 BTC
Fast: ~15 Minutes, 0.00038577 BTC