Haram

Companies with mixed income (Lawful and unlawful income) should not be involved in killing or supporting killers of innocents or dealing with alcohol, pork, gambling etc. Working in such mixed income companies then is considered lawful.

Wassalam.

Touching the fire is not permissible because it can cause serious harm, but there are other ways like preventing yourself from certain foods which you like or fasting. This can teach us to avoid sinning as much as we can, 

'Wassalam.

No. It is not allowed.

Wassalam 

Haraam money is not permissible to deal with or even to touch. Haraam money should be given back to its real owner and if unknown then to be given to the Marje; of Taqleed to distribute it among poor believers.

Wassalam.

Mut'ah marriage is an Islamic marriage which have many common things with the permanent marriage (Nikah) and few differences. Mut'ah marriage has certain conditions which be followed e.g, it is not allowed to do Mut'ah marriage with a woman who is currently married. It is also not allowed to do Mut'ah marriage with a woman who was married to another man and she is still in her waiting period Iddah.

Mut'ah marriage is not allowed with non Muslim woman except People of Book after permission from you Muslim wife according to many Maraaji'.

'Wassalam.

Haraam (unlawful) money must be given back to its real owners, and if you don't know them or their families, then it must be given to the Marje' of Taqleed as Majhool al-Malik (unknown owner) so that he distributes it among poor believers.

If you don't know the exact amount of the unlawful money mixed with your money, you must pay an amount which makes you sure that unlawful money has been removed away from your money. That amount should be given to the Marje' of Taqleed as well so that he distributes it among poor believers.

You are not allowed to give unlawful money to charity because it does not belong to you. Allah Says in Quran ( And never deal with the unlawful by spending from it in charity, because you don't own it). (Sura al-Baqara m verse 267).

Wassalam.

Our great Maraaje' of Taqleed have different opinions on cryptocurrency as some of them allow dealing with it, and some don't allow while few of them don't have any verdict yet.

Those scholars who allow dealing with cryptocurrency include Ayatullah Sayyed Moosa Shubairi Zanjani, do not differentiate between cryptocurrencies as far as dealing with it does not contradict or break the law of your country and it should not harm others.

Wassalam.

Haraam (unlawful) relationship must be ended immediately because it is Haraam. Whether there are religious differences or not, every Haraam is sinful act and must be stopped with out any delay. Discussing religious differences can be later but no way we can continue any Haraam relationship.

Wassalam.

Gambling is definitely not allowed but not all dealings in forex and stocks are gambling. Trading is allowed and gambling is not allowed.

Wassalam.

If the father does not fulfill his obligatory duties, his children are not responsible about that. The sacrifice (Qurbani) is not obligatory but only in Hajj. 
'if the father does not pay his financial dues like Zakat and Khums, the household income does not become Haraam.

Wassalam.

Dropshipping is allowed as far as you deal with lawful goods and inform the suppler and get his consent even by mutual agreement or understanding.

Wassalam. 

Yes it is Haraam to wash the arms three times during Wudhu. There are many Hadeeths in this regard which can be seen in Wasaa'il Al-Shia.

Wassalam.