Oh you're using a new link? It says: This domain was recently registered at Namecheap. Please check back later!
I guess your site in this new domain isn't ready yet. Good luck anyway, your site could be a good alternative as well when preev has a problem in the future. Looking forward for more Local currencies.

I couldn't see how it really works, it keeps on loading after clicking the button and not giving any result. I don't think it's a connection problem since I could stream online without a buff. Is it just me?

PS. A preev-like site would be good, leveled-up with altcoin would be better. You got pretty good suggestions from others so good luck.

You are almost good to go for your currency converter but it is lacking of altering other usual currencies.
Kindly add Euro,GBP also to make it look like a good converter. Later you would have to bind altcoins like ether,litecoin

Well, at least you have tried to, appreciate your efforts. And simplicity is a good idea as the ultimate sophistication.
As there are a lot of bitcoin calculators, it's good to try add some features such as altcoins-bitcoin exchange rate and add more currencies such as Euro, Pounds, jpy and cny. But, I realize api expenses is an obstacle to develop further, hopefully you find a way to maximize your service.

Good start, I like your site, simple and easy to understand. Suggestions for converting to altcoin as well. For bitcoin prices on the site it refers to the price where?
I will wait for the latest announcement from you.

Great idea, but you are late about 7 years with realisation of this idea. I think that such services already in place. I have this calculator in my Android bitcoin wallets for exmple

OK! This is a good start and you can improve it of course.

Firstly, of all research if you can convert/calculate the bitcoin to usd and vise versa in real time without needing to touch the button to convert (like google)

Secondly, I would suggest to add more currencies and this would increase the complexity of the website which increase the productivity (like converting btc<=> eth <=> fiat)

So this only works for 1 Bitcoin or higher right? I've just tested your site and tried to input 0.1 or 2.1 Bitcoin but the result is " Not a valid amount" comparing to my favorite Bitcoin calculator over there you can check even for 1 Satoshi, sometimes people want to calculate a decimal amount since calculating decimal amount is kinda hard, just my suggestion it is better if your site can check decimal or amount that lower than 1 bitcoin.

Bitcoinaverage is fine if you want to give a global rate, you can use different rates from different exchanges and let the users choose. It would be interesting to do a cron job to get an update of the price every minute and use it instead of sending a query on user side.
You should know that using bitcoin average means that in the case someone dumps bitcoin on a low volume exchange, you will get a fake rate, you should use the exchanges directly, here is a small list :

2    Bitfinex   BTC/USD    $246,667,000    $4033.70    6.54%    Recently
8    Bitstamp   BTC/USD    $95,266,300    $4029.13    2.53%    Recently
10    GDAX   BTC/USD    $88,622,400    $4047.97    2.35%    Recently
13    Gemini   BTC/USD    $68,539,600    $4054.49    1.82%    Recently
22    Kraken   BTC/USD    $41,966,200    $4065.99    1.11%    Recently
31    itBit   BTC/USD    $19,859,900    $4021.90    0.53%    Recently
34    BTCC   BTC/USD    $17,222,400    $4149.99    0.46%    Recently
52    CoinsBank   BTC/USD    $8,225,240    $3921.11    0.22%    Recently
61    HitBTC   BTC/USD    $6,678,150    $4036.67    0.18%    Recently
65    CEX.IO   BTC/USD    $6,003,540    $4192.98    0.16%    Recently
70    Gatecoin   BTC/USD    $5,597,830    $4100.10    0.15%    Recently
90    BTC-X   BTC/USD    $3,886,170    $4050.54    0.10%    Recently
98    xBTCe   BTC/USD    $3,540,630    $4023.40    0.09%    Recently
103    OkCoin Intl.   BTC/USD    $3,205,990    $4318.52    0.08%    Recently
118    BitBays   BTC/USD    $2,450,310    $4109.53    0.06%    Recently
133    Livecoin   BTC/USD    $2,081,400    $4050.00    0.06%    Recently
173    USD X   BTC/USD    $1,193,340    $3924.12    0.03%    Recently
181    BTC Alpha   BTC/USD    $1,070,170    $4035.00    0.03%    Recently
183    Exmo   BTC/USD    $1,058,320    $4015.00    0.03%    Recently
194    Gatehub   BTC/USD    $934,840    $3968.81    0.02%    Recently
210    DCExchange   BTC/USD    $688,478    $4057.30    0.02%    Recently
230    Bitstamp (Ripple Gateway)   BTC/USD    $591,542    $3852.28    0.02%    Recently
261    QuadrigaCX   BTC/USD    $450,369    $4149.99    0.01%    Recently
297    YoBit   BTC/USD    $276,304    $4080.52    0.01%    Recently
328    Lykke Exchange   BTC/USD    $215,453    $4178.93    0.01%    Recently
335    Bitex.la   BTC/USD    $200,568    $4050.00    0.01%    Recently
344    Fargobase   BTC/USD    $187,327    $4429.57    0.00%    Recently
380    LocalTrade   BTC/USD    $129,236    $4101.00    0.00%    Recently
390    BitMEX   BTC/USD    ** $365,317,000    $4050.60    0.00%    Recently
398    Quoine   BTC/USD    ** $277,953    $4061.68    0.00%    Recently

I got it from coinmarketcap, you can also directly use them to get an average rate.

Regarding the features, maybe you can add different currencies and widgets.