Hello! You're welcome to Bitcointalk. I'm happy to hear you're reading but it's cool you acquaint yourself with the rule of the forum so that you'd get instructed correctly and perhaps grow better here too. Take a look at some of the do's and don'ts of the forum below:

Unofficial list of (official) Bitcointalk.org rules, guidelines, FAQ
https://bitcointalk.org/index.php?topic=703657.0

everything you need to know about forum rank, activities and merits.
https://bitcointalk.org/index.php?topic=2766177.0

posting etiquettes
https://bitcointalk.org/index.php?topic=5184741.0#post_altgiveaway

Beginners and Help Encyclopedia
https://bitcointalk.org/index.php?topic=5364418.0

You can learn to start being a long term investor or a short term investor, you can also be very active onbthe bitcoin trading discussion boards on bitcointalk, here are other helpful threads to learn about bitcoin investment

new to trading?
https://bitcointalk.org/index.php?topic=5446799.msg61999785#msg61999785

trading news and tracking
https://coinmarketcap.com/gainers-losers/
https://www.tradingview.com/crypto-screener/

I want to learn more about bitcoin like how to get it.
You can mine it, exchange it, or receive it as gift or a currency being paid with your reward for offering a service instead of being paid in fiat, wgich is by earning bitcoin.

You can use an exchange to get bitcoin using fiat and then create a personal wallet to store your bitcoin and keep the keys safe

bitcoin history
https://bitcointalk.org/index.php?topic=5438353.0

To your question I'd say that DeFi will likely evolve, while some projects may fade, others will stabilize and simplify, making adoption easier. The company will continue to see innovation and growth, but security challenges will persist, prompting gradual improvement. As long as they're not relenting to innovations

Welcome once again!