In my opinion most interesting ways to use Bitcon:
1. Travel to Bitcoin City Arhnem in Netherlands
2. Travel To Bitcoin Country Liberland
Also while we keep Bitcoins in our wallets sometimes we want more returns and we are looking where to invest Bitcoin?
Wanting more returns can burn your Bitcoin, because altcoins are copy of Bitcoin and created to scam you, just like high yield investment programs, bitcoin doublers, etc...
The concept of digital currency is created by Satoshi Nakamoto and no matter what revolutionary idea altcoins advertise they will fade away.
Bitcoin have no competitors and any altcoin idea can be implemented in Bitcoin.
Only if you are willing to analyse allot, track the news and know when the dump will come you can profit from these altcoins while they alive.
Because no matter what i will say people will invest in altcoins expecting that someone will rise like Bitcoin and they Become millionaires.
Yes we can become millionaire from altcoins, but keep mind that they will fade away and know when to get out the boat.
Ethereum, Monero, these altcoins had potential to make you millionaire, but not anymore, they will fade away too.
I understand the psychology of investors and how media effects investments and i made a profit from them.
For example with Monero, public information been available when DeepWeb market "AlphabayMarket" integrate Monero.
Know when altcoin attracts huge investments and invest before.
Other way to use Bitcoin:
Trade stocks and forex with Bitcoin
How do you use your Bitcoin?
If you invest same btc in Altcoin when they are cheap,you can grow it many times.
I have myself invested some small amount in Altcoin and mede 2x-3x profit.
I have thinking just like you, and I think that would be the great way to growing your fund (in this case is bitcoin). I'm studying and trying to invest my money in Altcoin now and there are many profits (to me), I don't think that amount is big to many people, but according to me, with that interest and in just very short time that I get profits from Altcoin, I think this investment is suitable for me and not very hard to learn about.