I think that buying and holding Bitcoins would be your best Option if you want to earn good amounts of profits as Bitcoin, without any doubt if the most popular crypto available in the market. It has alot of potential to grow and you can easily expect it's price to be above 10,000$ by end of this year or so.
You can also buy and hold some progressive altcoin like ethereum if you are looking for short term investments but i would only recommend Bitcoin in the long run.

Both the projects are good and have alot of potential to grow in the future. But i think waves is better than ethereum simply because ethereum is one of the most popular altcoins available in the market. It is very promising project because of the features like smart contract and ethereum virtual machine. The team of ethereum is also very solid and the project has alot of potential to grow in the future. You can expect it's price to be above 1000$ within 2-3 years for sure.

I think that you should invest your money in some upcoming ICO which seems promising and legit to you. I would recommend you to have a look at XENIO. The project is very popular and is already performing pretty good in its pre sale. It raised more than a million in the first hour of pre sale.
You can also buy and hold some popular altcoins like ethereum and monero and these projects have tremendous growth potential.

I see alot of potential in WAVES and i think it can grow to tremendous heights in future. It is regarded by many as the platform which can replace ethereum in future and will surely hosts most of the ICOs in future. DEX(DECENTRALIZED EXCHANGE) is better than other exchanges simply because the fees charged in trades is very low and there is no withdrawal limit.
You can expect the value of waves to be more than 50$ within 5 years.

I think that a gambling site would be a better and more profitable choice as gambling is very popular activity and there are millions of people out there who gamble. It is an addiction for many as it can help you earn unbeleivable amounts of profit but is very risky. People tend to go all in and loose everything they own to the house when they gamble.
On the other hand, the only way for you to make profits from a dating site is by selling memberships which is very cumbersome.

I think joining various signature and bounty campaigns are the easiest way to earn both Bitcoin and altcoins.you can also earn a healthy amount of profit from trading and investing your coins but both of them are a little risky considering the volatile nature of the market. You can also earn tremendous profits by gambling but the earnings depend entirely on your luck.

Anything is possible but the chances of Bitcoin replacing dollar are very less. Dollar is the global currency and it is accepted almost everywhere and by everyone in this world. On the other hand, Bitcoin is not that popular and its acceptance is limited only to a few people.
Moreover, Bitcoin transactions charge very high fees which makes there use impossible for small transactions. Bitcoin transactions also require Internet and Bitcoin cant work offline.

Anything Is possible but the chances of Bitcoin to loose all its value is very low simply because it is one of the most popular crypto available in the market and many people believe in it. Many people regard it as one of the world's fastest growing investments and believe that it will show tremendous amount of growth in future.many have already invested their hard earned money in Bitcoin in hope to earn high profits in the long run.
For Bitcoin to loose all its value, people have to stop believing in it and i don't think that its possible.

I would probably pick ethereum, monero and litecoin as the top 3 altcoins simply because of the fact that the three of them are very popular and are based on unique ideas.
Ethereum is currently the most used platform for hosting ICOs and can show really good amount of growth in future. It also has a strong development team.
Monero is a coin based upon the idea of privacy. the transactions are secure and untraceable. The Identity of sender and receiver is kept private along with the amount sent during the transaction. You can expected price to be above $300 within 3 years.
Litecoin is a coin known for its fast transaction speed. it is almost 4 times faster than Bitcoin as it has a block time of 2.5 minute.  you can expect its price to be above $200 within 2 years.

Bitcoin is one the world's fastest growing investments without any doubt. It is the first and the master of all cryptocurrencies. It is also the most popular and most widely accepted crypto available in the market and you can expect good amount of growth from it in the future.
I think that Bitcoin has alot of potential to grow in the future and you can expect it's price to be above 15000$ within 5 or so years.

I think, if you want to invest you should invest in both NEO and WAVES as both of these projects can show really good amount of growth in the future.
WAVES is regarded as the ethereum killer by many and believe that it will replace ethereum in future and will host most of the ICOs in future.
The idea of decentralized exchange is also very unique and it makes waves a very promising project to invest your money in.
NEO on the other hand is also a very good project to invest your money. Many regard it as the Chinese ethereum. It is without any doubt one of the most promising projects to invest your money in. It can really show good amount of growth in future.

I think a gambling site is way more profitable than a dating site as gambling is way more popular than a dating site.gambling is an addiction for many and people tend to loose all their money in a desire to earn more. It is addiction plus profits, on the other hand, dating is just for fun and the only way for you to earn profits is by selling memberships to people which is very cumbersome.

Verge is a coin which is based on the similar ideals of MONERO. It is a completely anonymous coin which is secure and untraceable. The IP addresses of the users are also kept private during transactions. Transaction speeds are ultra-fast compared to other crypto and the average transaction time is of 5 seconds.
Within 2-3 years, you can expect it's price to be above 0.05$ for sure as this project has alot of potential.

I would probably choose litecoin, waves and MONERO for the long run as all of these coins have great potential to grow in the future. These coins are very popular and based on very unique concepts and ideas.
litecoin being famous for its lightning quick transactions. A block time of 2.5 minutes makes it almost 4 times faster than Bitcoin.
monero being famous for its privacy and completely anonymous nature. The amount sent in the transactions along with the identity of sender and receiver is kept secure.
waves is regarded as an ethereum killer by many and many believe that it will replace ethereum in future and will host most of the ICOs in coming years.
Good amounts of profits can be expected from the investment made in these coins in 2-3 years.

I think that you should hold your litecoins as this is one of those coins which are really popular and acn show tremendous growth in future. It is almost 4 times faster than Bitcoin as it has a block time of 2.5 minutes. It can process large number of transactions at once at lightning quick speeds and at very low fees.
You can expect it's price to be above 200$ within 2-3 years as it has a lot of potential.

The project is really interesting and i think that the of decentralized gaming has alot of potential and can really grow in future. The team also appears to be strong and promising.
The only concern i have is of one second blocks. I think it would be very difficult to keep up with the Blockchain.

Yes I think that cryptocurrency can overtake fiat money in the coming future.It is easily operatable and can be used by everyone.Cryptocurrencies are getting really very popular these days.Since no central bank has control over the cryptocurrencies,the people can get full profits and taxes can also be escaped.For cryptocurrencies,you just need to have an internet connection and some basic knowledge about them.Bitcoin is at the top of the cryptocurrencies.The traders are also accepting bitcoin for trading.People cannot carry huge amount of money everywhere.Bitcoin wallet or blockchain wallet is the solution for carrying a huge amount of money.The privacy is maintained and only the receiver and giver know about the wallet.

In my view,bitcoin is spreading its root all over the world.It is drawing attention of every individual in this world.Bitcoin is becoming the centre of investment and trading.I like bitcoin as it has a high selling price and it helps to improve financial situation.Bitcoin is the only income source I have right now.I have saved some bitcoins and whenever I need money,I use them.I have also invested in bitcoin.This also gives him high returns.Bitcoin is like a part time job for me.Besides my studies,I devote a lot of time to bitcoin.I also earn some bitcoins from the signature campaigns too.

Yes bitcoin is getting really very popular all over the globe now.It is the most demanded and easiest of all the cryptocurrencies available today.Rich people have started investing in bitcoin as the know they will get high returns and huge benefits in the long run.It's price is also increasing so we get good payments when we join a signature campaign.Some traders are also now accepting bitcoins for trading.In some nations,bitcoin is getting legalised too.Common people are also now taking interest in bitcoin as they need money and bitcoin is the easiest way to earn money in a short period of time.Bitcoin is available worldwide.You just need to have an internet connection and some basic knowledge about it.Since it found all over the global,it can be considered as a global currency.

Bitcoin is the fastest growing crptocurrency today.It is becoming famous with time and it's demand is also increasing.The price of the bitcoin is also now increasing All kinds of people whether rich or poor now have started to use bitcoin.Looking at high profit margins and good returns from invests,bitcoin is getting very demanding among the rich people.Payments are done now a days with bitcoin or cryptocurrencies.It is easier to regulate and manage.There is no intervention of the government or any central bank.So taxes are also saved and there is full profit margin.If someone has some bitcoins and he wants to spend them or pay something,he can do it with the bitcoin wallet or blockchain wallet which is very simple to work on.Traders today have also started trading in bitcoin.