To invest is to allocate money in the expectation of some benefit in the future. In finance, the benefit from an investment is called a return. The return may consist of a gain (or loss) realised from the sale of property or an investment, unrealised capital appreciation (or depreciation), or investment income such as dividends, interest, rental income etc., or a combination of capital gain and income.
The company must not sell pork nor alcohol. Cigarettes business is unlawful according to many scholars. You need to refer to your own Marje' of Taqleed in the matter of cigarettes and seek his verdict in it. Accordingly you will know whether it is permissible or not to invest in such company.
It is allowed to buy shares of any company which does not do Haraam business like alcohol, gambling, pork etc.
Company with whole allowed business but taking loans from the non Muslim banks, does not make the company Haraam.
Yes it is permissible like any other business as far as it is real business and not gambling nor cheating in selling something which is not existing.
Yes it is allowed as far as the company which issued the shares is dealing with fully lawful business.
We are not allowed to invest in any company dealing with unlawful activities no matter how much is the percentage of it. Muslim is allowed to invest when 100% of the business is lawful.
Trading online is like face to face trading. It must be away from forbidden dealings like usury. Trading in currencies is allowed.
If you mean by CFD trading the Forex trading, then the answer is: It is allowed if it deals with companies dealing with lawful activities only. It has the same rules of stock exchange dealings which are permissible if the shares are from companies dealing with lawful activities only.
According to our leading Maraaji' of Taqleed , it is allowed to trade online in gold, oil, and other stock exchange companies as far as the company does not do unlawful business like alcohol or usury etc. Buying and selling online is allowed.
Buying government Bonds is permissible for investment if you are sure that the money or any part of it will not be invested in unlawful projects like weapons, alcohol,gambling, usury,etc.
It is allowed if the hotel group does not allow or deal with Haraam business like alcohol, singing parties, etc.
Online trading is like face to face trading. It is allowed if the material is allowed and vice versa. Stock market trading depends on the activities of the company of the shares. If the company deals with non Halal ( forbidden) business like interest, alcohol, etc, then buying or dealing with shares of such company is not allowed. If the company deals with permissible activities, then dealing with its shares will be permissible.
If you mean that the company rewards you with more tokens if you do more business with them or vote for them or bring more customers, then this reward is allowed
for you. This is when the activities of the company is investing in lawful business only.