I think the word has any and all of the following connotations here:

hustle
b: to sell something to or obtain something from (someone) by energetic and especially underhanded activity : SWINDLE
hustling the suckers
an elaborate scam to hustle the elderly
c: to sell or promote energetically and aggressively
hustling a new product
d: to lure less skillful players into competing against oneself at (a gambling game)
hustle pool
http://www.merriam-webster.com/dictionary/hustle

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Note added at 21 mins (2021-05-11 21:17:02 GMT)
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In your second example, the following definition (also from Webster's) applies:

to obtain by energetic activity —usually used with up
hustle up new customers
try to hustle up some tickets to tonight's game
hustling up some grub

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Note added at 33 mins (2021-05-11 21:28:59 GMT)
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So Elon Musk is saying Dogecoin is dishonest, but your other quote means good things come to people who work hard.

Hustle comes from the Dutch word for "shake" or "toss." As a noun, a hustle is a busy, hurried scene, like the hustle of the subway at rush hour. We also call the act of swindling a hustle, because it happens so fast. As a verb, hustle can either mean to swindle someone or to hurry them, or to work hard.

It is also defined as a swindle in which you cheat at gambling or persuade a person to buy worthless property.