Why did Bitcoin increase in value lately? Governments around the world sent pandemic relief checks to their citizens (raising national debt). What did people do with the money? Bought Bitcoin.

I agree. Cryptocurrency is printing money out of thin air. Tether, trading bots, and wash trading certainly pumps up the price. So does hype and people having extra money on hand due to generous unemployment benefits and government checks to all. Plus people have more time stuck at home due to coronavirus so they're online more. 

If you've got money you're willing to lose, it's an easy to way to make gains in a very short period of time.  But, again, be prepared to lose it all since it's the wild west of "investing." 

So far as I know Gopax only lets me withdraw to my Nonghyup Bank Account.  Is there any other way to link to a cold wallet or any other crypto website?  I don't see anything on their page, though their software interface isn't always clear about things. 

I believe Elon Musk had said investing in Bitcoin is crazy but so is keeping our fiat currencies with more and more money printing.  So, what can you do?  I am still unsure of it and I only have a tiny amount in crypto.  So, either a loss or a gain.  No big loss either way.  I was skeptical of it for years.

Well, Musk now endorses Bitcoin (e.g., accepts it as a form of payment if you're buying a Tesla).

Make no mistake-- crypto is a bubble right now; it's dot com all over again but even worse as it's not regulated. I mean, even Dogecoin has a market cap of 7 billion.

But, again, as I said, if you've got some money you're willing to gamble, do it in crypto.  Investment strategies such as yield farming can further potentially accelerate your gains.  Just stay away from the derivatives.

To invest in crypto, you've got to throw fundamentals out the window in order for you to pull the trigger; it's all momentum trading right now.

Our fiat currencies can't continue for much longer.  Not sure if I should also buy some gold and silver too.  Just storing it in my place secretly is a lot.  ETFs are only as good as the companies that don't crash or the governments that may seize the mines in an emergency.  Of course they could seize the crypto too.  Anyways a small amount is worth the risk I guess.  I still don't know everything about it. 

Yes, only invest what youre willing to lose--it's pure speculation. But, knowing some technical analysis (i.e., chart reading) could help since fundamentals are essentially are non-existent.

Case in point: Dogecoin is worth 7 billion [1] even though it was started as a joke [2].

[1]  https://coinmarketcap.com/
[2] https://finance.yahoo.com/news/dogecoin-co-founder-says-cant-041754927.html

To invest in crypto, you've got to throw fundamentals out the window in order for you to pull the trigger; it's all momentum trading right now.

Yes the billions of dollars being invested in btc by companies, insurance funds, pension funds etc are definitely momentum trading