as far as I know:
The IRS has decided to deal with convertible cryptocurrencies as a property [Payment of tax on capital gains] That means when you make a purchase using Bitcoin, you have to record the amount, subtract the cost from the price and report the difference.
So I think you will only pay/report if you make a conversion not holding.
you can use this tool to calculate taxes: https://www.bitcoin.tax

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it’s better to move this topic into legal

I agree with you but to be precise it about takes risks?.
If we go back in time to 2010, no one will buy your bitcoins "sirius sold 5000 bitcoins for 5$ only" but now anyone ready to pay more than 7,000$ for 1 bitcoin.
So if you invest 7,000$ in 2010 you will get much higher profits than you invest in 2013, 2018 or 2020.
But why, because the first members took risks, they made huge profits.

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Start your own project, take risks and prepare for profit

floating supply: Means that one of the parties controls the price or in other words "centralization".
fixed supply makes bitcoin like gold "limited and finite supply" However, unlike gold, developers can change the total number of bitcoin in what is known as hardfork.
The power point that makes bitcoin break the barrier of limited 21 million units is can be divided into small pieces Satoshi(100,000,000).
In other words, you have 21 million or 2,100,000,000 Satoshi

I have a friend who follow the instructions in this video and managed to download Android apps( apk files ) on his Windows Phone https://youtu.be/ikv3kMjcHMg.
Personally, I do not like this method, especially if your phone is old (the risks you are going to have).
If you insist on using your phone, you can try these solutions:

• Download coinspace. remember this wallet is Centralized validation
• Use online wallet: You can use any wallet of your web browser like blockchain.info

Stop amplifying things, The real news is Your bank will not allow you to buy bitcoins anymore
It is planned by governments to try to regulate the Bitcoin and at least limit the entry of large capital funds.
For you, this regulation will not affect you very much unless you intend to invest in large amounts(more than 10 Bitcoins).
you can use some temporary solutions:

• online sellers: localbitcoins, paxful
• online forums: Currency exchange

Before you start investing, it is better to gain general knowledge about the economy/Speculation and check bitcoin charts.
you can use some online tools to help you like 1. https://bitcoinwisdom.com 2. https://cryptowat.ch
As the price fluctuates constantly, the current time is the best time to buy more and wait until the price rises.
you can buy now and hold price will rise fast.

Since this wallet is not entirely open source(you can see some parts of code here https://github.com/ExodusMovement) &“Quite Vulnerable” was detected, this will weaken its safety.
It generally has many advantages than disadvantages and offers many reliable services with zero problems.
No one reported a software/protection problem(you can trust it).
Just export your private key and keep it save  

I do not know but I suspect that most of the escrow services do not include this type of service.
you can try this site ------> https://www.gyft.com/buy-gift-cards/google-play/
I have not used this site but it seems to be a trusted site or at least more confident than the rest of the users here.
they accept bitcoin, PayPal, Visa,...etc

First, I would like to congratulate you on your attractive design.
To get a unique search platform you should give more analyzes instead of searching for general facts like the Market cap, Price,....etc.
One of the best measures that indicate the strength of the currency is the developed team so start searching for them and give them points based on building expertise, projects, etc. The result of this research is a technical recommendation using this currency.
Perform price analyzes as a search option for currency performance.

sign message has nothing to do with the blockchain or bitcoin(You do not need to pay) but it is just proof that you can access to your private key(Thus you can spend money/bitcoins).
When you sign a message, you create a signature associated with the address and the message itself and a change will occur when you add anything to that message(even space or comma).
Read this ----> https://gist.github.com/gavinandresen/4120476
Avoid using such words when signing any message
Also, remember to add time and date and be precise in the description so that the message can not be used again

I do not know the effect of localbitcoin on the Bitcoin value but I do not think it will be big or for the long-term.
Overall the price returned to rise after a long decline so we will see a bullish trend in the coming days and perhaps raise the level of stability from the barrier of (6000$ to 7000$ )to (8000$ to 10,000$).
mempool is still empty and the confirmation of conversions takes less time
more good news coming, Keep holding  

You have many reasons why this price is right/suitable?

• We have about 21 million bitcoins and about 17 million have been mined
• The G20 meeting clearly indicated the lack of intention to ban any cryptocurrencies.
• Many countries began accepting the Bitcoin despite reservations (taxes and regulation)
• Bitcoin value [2017-04-04]  $1,131.03  ------------------>   Bitcoin value [2018-04-04]   $7,370.38
• The price of the Bitcoin has seen a major collapse leading to an increase in the coming days

Far from whether the product is real or scam, the profit is the most important reason for speculation
The idea of the project must be revolutionary, solve real problems, motivated to help more than profit with real and future plans.
The team is not required to be famous but at least have experience with proving their competence(github, youtube,...etc).
An open source project with an openness to answering questions and contributing to its development(not just copy/paste).

No, Let probability science speak  :
There are 2048 words to be chosen in the seed and you have 24 words to create your seed.
2048^24= 2.9642775e+79.
You need a supercomputer to do the processing that takes a long time as well as the electricity bill.
Your money (0.1 BTC or 700$) will look slim if compared to the cost of restoring your seed.
Sorry for your loss

It is better  to know how a nano ledger s works to get clear answers to all the questions in your mind:
When the device is turned on for the first time, it’ll generate aforementioned 256-bit seed [Read this for more information’s https://github.com/bitcoin/bips] "You must type these words and save them in a safe place" then you will enter a PIN to access your cryptocurrencies if you have this device or your 24-words seed if you lost your PIN/device.
Read:
IMPORT YOUR LEDGER BACKUP IN ANOTHER WALLET
How Do Hardware Wallets like the Ledger Nano S Work?

I do not think that poor children can buy a computer or speculate at the price of the Bitcoin.  since the currency is universal and can be used by anyone, it may benefit the poor in the following:

• The acceptance of the Bitcoin will stimulate the local market, thus the economy is flourishing and (poverty & unemployment) will low
• Open-source currencies will enable smart children to develop their own currency
• The use of Bitcoin globally will enable everyone who has the talent to find a source of livelihood for him and his family(drawing, singing,...etc)

In general, the answer is yes

Will affect in the short term only if it is confirmed that these currencies have already sold but since the market did not see a rebound (1%-3%), I do not think that's what happened.
Good news: There are still 10,000 bitcoins in the market and have not been lost or wasted.
16rCmCmbuWDhPjWTrpQGaU3EPdZF7MTdUk  recive 7,000 BTC 2018-03-24, 4,500 BTC 2018-03-19 and 5,000 BTC 2018-03-06

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More good news: you can send $ 74,134,900.00 using $ 0.30 fees

I see there are options between coinomi and Greenaddress wallets. But if you ask me, I think Greenaddress will win and the main reason for winning is security.
also, Greenaddress support P2SH & P2PKH which seems appropriate due to the lack of the use of Bech32.

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Source:
#1 https://greenaddress.it/en/faq.html

ما هي ال Forks؟

تقنيا يوجد لدينا نوعان من ال Forks:

hardfork: هو تغيير يحدث لبرتوكول البيتكوين او اي عملة رقمية يجعل من القوانين والمعاملات السابقة غير الصالحة صالحة مثلا كتغيير في العدد الكلي للعملة او عملية انتاج العملة مما يجعل من كل العقد والمستخدمين الاخرين الترقيه للتحديث الجديد
مثال: اذا اردت تغيير العدد الكلي لعملة البيتكوين يعتبر hardfork لانة تغيير في برتوكول البيتكوين

Softfork: هو تغيير في بروتوكول البيتكوين او اي عملة رقمية بحيث تكون المعاملات الصالحة سابقا غير صالحة ولكن فية ستتعرف العقد القديمة علي الكتل الجديدة كصحيحة مما لا يتطلب تحديثها فالمنفذ يكون متوافقا معها
التغيير في صيغة العنوان تعتبر Softfork .