If you are managing a business and you are getting paid in Bitcoin you don't need a forecasting tool, are you a crypto trader?

In your business, what matters is the present value, if the item you selling is $3, your customers will have to pay $3 in value at that very moment, it is now left for you to hold that Bitcoin or exchange back to USDT to retain that value from going down.

A popular crypto wallet like Electrum mobile and a popular crypto exchange should do the job I believe, accounting software and forecasting tools don't cut for me, it's not necessary.

A forecasting tool could make sense if you plan to become a crypto trader but it's not necessary, you need better trading tools and you need to learn how to read charts, I believe that any act of trying to predict the future price actions of Bitcoin could land you in a bigger problem, as a trader it's better to put trust in what the chart says, not what you want to see happen.

Agree with your statement if someone invests according to these rules then they can easily get profit but for it they have to adopt a regular learning mechanism as well as they have to cope up with every type of situation.

Investment for Four years is good because halving takes place after every four years so buy at lower price and hold until the time of halving but in such duration if you see more changing situations then keep hold instead of losing hope as well as money.

Don't make investment as a burden for yourself by investing all your money and continue your investment according to what you afford and it is necessary to invest in bitcoin but it is not necessary to invest the whole amount at once  therefore use the method of DCA if you desire for huge profit with minimum or no loss.

The combination of wallet, exchange, forcasting etc are just common security major. As a trader or investor you'll have to make a right choice about your wallet or exchange etc, security is normal when dealing with Bitcoin to avoid being a victim to scammers. Managing cash flow with Bitcoin is something different from your explanation, it's either an investor decide to hold and during the process of buying or selling can be referred as cash flow or rather an organization using Bitcoin as a currency can decide to practice this move when dealing with other organization financially. As an investor investing using the dca strategy or other strategy will practice management when it comes to planning, I believe the management here is referring to our plans including the amount we use to purchase Bitcoin, weekly or monthly plan can be done by any investor before investing.

So what are you suggesting? Some software that you've discovered and you want us to use it but it comes with a hefty fee? With my experience, I have never use any of those accounting software but just held it for as much as I can and fortunately, until now I've got some money to hold. And about exchanges, you shouldn't use exchanges that you have a sketchy feeling with because it's best to just stay with either cex or dex that you have experience and have a comfort using them. As for your personal cash flow, always separate that with your investment. Leave your BTC investment while managing your cash flow because if you'd include that to your finances, there's a big chance that you'll have to take out your btc and sell it because you've included it to your cash flow.