Permissible and impermissible items of trade

Selling branded items and trading in shares

Q:

1. Hermes is a fashion brand and its name was taken from a Greek figure. However, the bags do not have the Greek symbol for Hermes. Is it permissible to sell the bags anyway? What I mean with Greek figure is Greek 'god' (their words, not mine).

What about selling Louis Vuitton bags or Jordan Sneakers. Their name doesn't represent a 'god'. Just a person. 

2. My second question is about day trading. First of all, is day trading stocks (non-haram businesses) permissible. And what about day trading crypto. So, trading ARK for BTC. Both are cryptocurrencies. Is this trade a form of riba because it seems like it is a 'gold for gold' trade (both cryptocurrencies, but they have different values and meanings).

3. You said that investing in halal companies is permissible, however the interest that they are involved in is totally forbidden. But does that make my earnings forbidden (and does it come in the category of 'witnessing riba')? 

Selling Nike shoes

Q: I have read somewhere that it is better to avoid wearing Nike, because it symbolizes a 'Greek mythical figure' (if you know what I mean). But what about selling the shoes.  Because Nike and Jordan are amongst the best selling shoes.

Crypto Currencies

Q: Is day trading in cryptocurrencies halal? Day trading basically means buying and selling your shares within a day. Note, I have knowledge concerning this subject and for me it is not like gambling. What I do (and almost everyone else does) is checking the chart and based on the chart's movements, I make a decision whether or not it could be a good trade. However, what made me doubt the legitimacy was gharar and maysir. I have done so much research about these terms and it still remains kind of unclear whether it is a form of gharar and/or maysir.