Anyway, in my opinion I don't think the statistics presented by google are accurate, because if you take a poor country where only a small portion of the society has internet access, it's likely to see a higher number of bitcoin searches, because that is only the educated parcel of the population who have access to google. While there are another countries where vast majority of population has access to internet, including the uneducated ones, so it's likely the number of bitcoin searches will be severely diluted among so many other worthless searches about celebrities, gossips, tv shows and so on... This way, these countries are never going to be shown on the statistics with positive results, although there are a much superior number of bitcoin enthusiasts there in every aspects possible and imaginable (even proportionally speaking), if compared to the top ranked countries.
Your theory would make sense if top consists of mostly poor countries where not many people have Internet access, but that's simply not true. Only 2 out of those 10 (El Salvador and Nigeria) can be called poor, and if you expand that list to top 30, only 3 more are in that group of "poor" countries. Also, I think that even in poor countries people nowadays have access to internet as it's not 2000s anymore, now all you need is a $100 smartphone to be able to access the internet. Not of course as fast and stable like in developed countries, but access nevertheless.
Another thing, keep in mind that Google has an option to exclude countries/regions with low volume (countries like Cayman Island, Luxembourg and various tiny island-states). For those interested, below is the full list for the 7 days period, including the countries with the low search volume (you will notice that those countries don't have the rating in this list but can see it if you check the link below the list).
El Salvador,100
Central African Republic,
Nigeria,34
Namibia,
Netherlands,26
Liechtenstein,
Turkey,25
Cayman Islands,
Switzerland,24
Austria,23
Curaçao,
Cameroon,
Caribbean Netherlands,
St. Kitts & Nevis,
Antigua & Barbuda,
Barbados,
Andorra,
Canada,20
Sint Maarten,
Slovenia,20
Bermuda,
Bahamas,
Cyprus,
Singapore,19
St. Helena,
Bhutan,
Aruba,
Germany,19
Seychelles,
Mauritius,
Ghana,17
Belgium,16
Czechia,16
Kosovo,
St. Martin,
Botswana,
Papua New Guinea,
Trinidad & Tobago,
Luxembourg,
Australia,15
Northern Mariana Islands,
Suriname,
Chad,
Turks & Caicos Islands,
Croatia,14
Madagascar,
Grenada,
Belize,
Spain,14
Togo,
Benin,
United Arab Emirates,13
Iceland,
United States,13
St. Lucia,
U.S. Virgin Islands,
South Africa,13
United Kingdom,13
Isle of Man,
Burundi,
Slovakia,12
Côte d’Ivoire,
New Zealand,12
St. Pierre & Miquelon,
Ireland,12
Lebanon,
Portugal,12
Jersey,
Gibraltar,
Anguilla,
Dominica,
British Virgin Islands,
Albania,
Estonia,
Kenya,11
Brazil,11
North Macedonia,
Congo - Brazzaville,
Finland,11
Åland Islands,
Malta,
Sweden,11
French Polynesia,
Guernsey,
Italy,10
St. Vincent & Grenadines,
Romania,10
St. Barthélemy,
Guam,
Mali,
Pakistan,10
Brunei,
Zimbabwe,
Ethiopia,
Faroe Islands,
Jamaica,
Argentina,9
Lesotho,
Panama,
Eswatini,
Rwanda,
Poland,9
Norway,9
Colombia,9
Georgia,
Venezuela,9
Maldives,
Bahrain,
Hong Kong,8
Bulgaria,8
Malaysia,8
France,8
Greece,8
Guyana,
Réunion,
Equatorial Guinea,
Burkina Faso,
Zambia,
San Marino,
Cuba,
Gabon,
Montenegro,
Costa Rica,
Mongolia,
Marshall Islands,
Afghanistan,
Lithuania,
Somalia,
Serbia,7
Latvia,
Hungary,7
Guadeloupe,
Fiji,
Gambia,
Greenland,
Angola,
Paraguay,
Djibouti,
Senegal,
Mexico,7
Dominican Republic,6
Bosnia & Herzegovina,
Macao,
Israel,6
Laos,
New Caledonia,
Denmark,6
French Guiana,
Armenia,
Niger,
Tunisia,
Uruguay,
Sri Lanka,
Cambodia,
China,
Honduras,
Vanuatu,
Tanzania,
Peru,6
Morocco,6
Cape Verde,
Chile,6
Vietnam,6
Guinea-Bissau,
Qatar,
Philippines,5
India,5
Moldova,
Uganda,
Malawi,
Russia,5
Sierra Leone,
Thailand,5
Guatemala,
Mauritania,
Kuwait,
Ecuador,5
Puerto Rico,
Solomon Islands,
Turkmenistan,
Palestine,
Martinique,
Nepal,
Haiti,
Western Sahara,
Azerbaijan,
Guinea,
Mozambique,
Mayotte,
Palau,
Liberia,
Nicaragua,
Bolivia,
South Sudan,
Myanmar (Burma),
Iraq,
Indonesia,3
Oman,
Jordan,
Bangladesh,3
Algeria,
Uzbekistan,
Belarus,
Ukraine,3
Samoa,
Congo - Kinshasa,
South Korea,3
Saudi Arabia,2
Kazakhstan,
Kyrgyzstan,
Iran,2
Syria,
Egypt,2
Libya,
Tajikistan,
Yemen,
Taiwan,1
Sudan,
Timor-Leste,
Japan,<1
Kiribati,
Svalbard & Jan Mayen,
Micronesia,
Cook Islands,
Comoros,
São Tomé & Príncipe,
Montserrat,
Eritrea,
Tonga,
American Samoa,
Falkland Islands (Islas Malvinas),
Antarctica,
French Southern Territories,
Bouvet Island,
Cocos (Keeling) Islands,
Christmas Island,
Heard & McDonald Islands,
British Indian Ocean Territory,
Monaco,
Norfolk Island,
Niue,
Nauru,
Pitcairn Islands,
North Korea,
South Georgia & South Sandwich Islands,
Tokelau,
Tuvalu,
U.S. Outlying Islands,
Vatican City,
Wallis & Futuna,
Source:
https://trends.google.com/trends/explore?date=now%207-d&q=bitcoin